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Bibliometric Analysis of Research Trends and Hotspots Over 23 Years of the Relationship between Ischemic Stroke and Gut Microbiota

DOI: 10.31038/AWHC.2024744

Abstract

Ischemic stroke (IS) is a global functional disorder, its root causes and mechanisms are still unknown. Recent research focuses on the link between gut microbes and IS. Our biometric analysis of 1015 articles (2000-2023) shows key research trends, hotspots like fecal macrobiotic transplantation, and highlights research gaps, providing insights for future IS studies.

Keywords

Ischemic stroke, Intestinal flora, Cite space, Bibliometric analysis

Ischemic stroke (Ischemic Stroke, IS) is a disorder in blood circulation in the brain, causing ischemic necrosis or softening of localized brain tissue caused by ischemia and hypoxia, which leads to the functional defect of the nervous system. Stroke is the second leading cause of death in the world. It has the characteristics of high incidence, high disability rate, high mortality and high recurrence rate. Although a lot of research has been done, the cause of IS is still unclear. Studies have shown that intestinal flora plays an important role in the occurrence and development of IS. The structure of human intestinal flora is complex and plays an important role in central nervous system, endocrine system, immune system and other systems. The ‘flora-gut-brain axis’, as an information exchange network connecting the central and intestinal flora, plays a key role in the occurrence and development of IS. Imbalance of intestinal flora or abnormal metabolism can lead to neuroinflammatory and degenerative lesions, which is an important link in the occurrence and development of IS. So the study of the relationship between intestinal flora and the occurrence and development of IS may provide new ideas for the prevention and treatment of IS. Recently, the relationship between IS and gut microbiota has attracted more and more attention. Scholars have carried out a lot of research on it, but there is no comprehensive and systematic research on it. Therefore, it is necessary to conduct a comprehensive and in-depth study of the research status through visualization methods, and to explore its future development trends and hotspots in depth [1-4].

Bibliometrics  takes  the  worldwide  literature  pattern  and characteristics of literature as the main research objects, and uses the mathematical and statistical methods to analyze the distribution mode, quantitative relationship and variation law of literature information, so as to explore the structure, characteristics and rules of a specific field. Bibliometrics can not only make quantitative statistical analysis of papers in a specific field, but also accurately reflect the most representative papers. Furthermore, the results of bibliometric analysis can show a large amount of data in the form of knowledge maps, so that researchers can conduct a comprehensive analysis of the development of a discipline and can intuitively understand it. Therefore, this topic intends to use the method of bibliometrics to statistically analyze the literature related to IS and intestinal flora from the whole world, and use Citespace6.1.R6 software to visualize the statistical results, so as to summarize the current research progress and hot spots related to IS and intestinal flora, so as to help researchers better understand the research status and hot spots in this field, and put forward corresponding research strategies, so as to further develop IS and intestinal flora. The mechanism of action and the development of corresponding targeted drugs lay the foundation [5,6].

Methods and Materials Data Source and Search Strategy

A bibliometric literature search was conducted on the core collection database of Web of Science (WoS) from January 1, 2000 to July 31, 2023. The retrieval formula is set as follows: TS=(gastrointestinal microbiomes OR microbiome, gastrointestinal OR gut microbiome OR gut microbiomes OR microbiome, gut OR gut microbiota OR gut microbiotas OR microbiota, gut OR gastrointestinal flora OR flora, gastrointestinal OR gut flora OR flora, gut OR gastrointestinal microbiota OR gastrointestinal microbiotas OR microbiota, gastrointestinal OR gastrointestinal microbial community OR gastrointestinal microbial communities OR microbial community, gastrointestinal OR gastrointestinal microflora OR microflora, gastrointestinal OR gastric microbiome OR microbiome, gastric OR gastric microbiomes OR intestinal microbiome OR intestinal microbiomes OR microbiome, intestinal OR intestinal microbiota OR intestinal microbiotas OR intestinal microflora OR microflora, intestinal OR intestinal flora OR flora, intestinal OR enteric bacteria OR bacteria, enteric) AND TS= (cerebral arterial thrombosis OR cerebral infarction OR cerebral ischemia OR Ischemic cerebral infarction OR Ischemic stroke).

Inclusion and Exclusion Criteria

After screening the titles and abstracts, the studies related to IS and intestinal flora were selected. Only articles and comments are included. Other file types, such as letters, comments and meeting summaries are excluded. In addition, the publishing language is limited to English. Finally, 1015 records are determined for final analysis [7].

Analysis Method

CiteSpace is a visualization software for bibliometric analysis developed by Professor Chen Chaomei (University of Drakesell, USA). We used CiteSpace 6.1.R3 to analyze the final record. The main parameter settings are as follows: time slice (2000-2023), number of years per slice (1 year), selection criteria (g-index, k=25) and pruning (pathfinder and pruning the merged network). Other parameters are set according to the CiteSpace manual for different situations. The VOSviewer software is a useful tool for constructing and visualizing a bibliometric network. It was developed by the Science Center in 2007 at the University of Leiden (Netherlands) for technical research. Free to download (https://www.vosviewer.com/)). In the VOS viewer software, each node represents different parameters, such as countries/ regions, journals, institutions, keywords, etc. The size of the node is determined by the weight of the parameter, such as the number of publications, the number of references or the frequency of occurrence. The higher the weight, the larger the node [8]. Nodes and lines are colored by the cluster they belong to. Lines between nodes represent links. Link strength is evaluated by the total link strength index (TLS), which is the sum of all link strength and can be extended to reflect the link strength between institutions [9]. Additional information such as Journal Impact Factor (IF) and Journal Citation Report (JCR) was obtained directly from the Web of Science website on July 31, 2023. Analyze annual publications with Microsoft Office Excel 2019.

Interpretation of Main Parameters of Visual Map

Clustering view and burst detection: Clustering view is performed on the generated graph, and each cluster is annotated by referring to the title, keyword, and subject word in the reference summary. The role of burst detection is to detect a large change in the number of citations in a certain period of time. Therefore, it can be used to find the drop or rise of keywords [10].

Double graph overlap: Double graph overlap is a new method to display the distribution and citation trajectory of articles in various disciplines. As a result, there are original journal on the left side and cited journals on the right side. The curve is the citation line, which completely shows the context of the citation [11].

Result

Publications and Citation Analysis

It can be seen from Figure 1 that the annual number of publications and citations in the WoSCC database showed an overall upward trend from 2000 to 2023. Before 2015, the research on IS and intestinal flora was relatively slow, with no more than 80 annual publications. After 2015, the annual number of publications and citations increased gradually, and the number of publications increased step by step.

Figure 1: Number of papers published from 2000 to 2023

Country/Region Analysis

The top 10 countries/regions in the WoSCC database on IS and intestinal flora are shown in Table 1. The top three countries in this field were the United States, China and Canada, accounting for about 47.63% of the total number of publications. Among them, the United States (24.60%) is the country with the most published papers, followed by China (17.49%) and Canada (5.53%). The United States has the highest total citations and H-index, while Sweden has the highest average citations per article.

Table 1: Top 10 countries/regions that published publications

Rank

Countries/Regions Article counts Percentage (n/1772) Total citations Average citations per article H-index TLS
1

USA

436 24.60% 39,735 90.93 81

360

2

China

310 17.49% 15,658 50.51 38 138
3

Canada

98 5.53% 8,478 86.51 33

165

4

England

70 3.95% 15,364 219.49 30 204
5

Germany

67 3.78% 13,702 204.51 32

154

6

Australia

49 2.77% 13,117 267.69 24 73
7

Japan

49 2.77% 12,476 254.61 19

29

8

Italy

45 2.54% 12,532 278.49 19 93
9

Netherlands

34 1.92% 7,924 233.06 24

129

10

Sweden

34 1.92% 11,913 350.38 19

136

Figure 2 is the map of international cooperation between countries/ regions, in which the thicker the line between the two countries, the closer the cooperation. As shown in the figure, countries such as the United States, China and Canada have closer ties with other countries. Figure 3 is the country’s citation network visualization map. Countries with total link strength (TLS) over 200 are USA (TLS=360) and England (TLS=204), indicating that these two countries are more influential internationally. In general, USA, China and Canada are the main international contributors to the study of ischemic stroke and intestinal flora, with the largest number of publications and high quality of papers.

Figure 2: International cooperation map between countries/regions

Figure 3: Citation network visualization of countries

Mechanism Analysis

Table 2 shows the top 10 institutions published in the number of articles which are the most active institutions in the field of IS and intestinal flora research are mainly from. China and USA have the largest number of published papers, and the top three institutions are Southern Medical University, University of California, SanDiego and Harvard Medical School. Harvard Medical School in the United States has the highest number of citations and H-index.

Table 2: The top 10 institutions in the number of articles published

Rank

Institutions Countries/Regions Article counts Total citations Average citations per article H-index TLS Centrality
1

Southern Medical University

China 36 5,162 125.9 17 13

0.03

2

University of California, SanDiego

USA 26 12,196 381.13 18 111 0.02
3

Harvard Medical School

USA 25 14860 215.36 31 56

0.03

4

China Medical University

China 24 4,056 162.24 11 38 0.01
5

University of Texas Health Science Center at Houston

USA 23 5036 162.45 18 49

0.01

6

Cleveland Clinic Foundation

USA 22 12,582 419.4 19 59 0.14
7

Baylor College of Medicine

USA 21 5,870 183.44 20 39

0.07

8

University of Toronto

Canada 19 6187 247.68 16 48 0.02
9

Albert Einstein College of Medicine

USA 18 4,066 193.62 19 93

0.15

10

Western University

Canada 18 3,987 199.35 18 11

0.01

Figure 4 is an institutional network collaboration map created using CiteSpace. Each node in the map represents a different institution. The darker the color of the node, the later the active year. Albert Einstein College of Medicine had the highest centrality (0.15), followed by Cleveland Clinic Foundation (0.14). When the centrality value is greater than or equal to 0.1, it indicates that the node is the key node of the network graph. It can be seen that these three universities play an important role in institutional cooperation. There are 789 links and 135 nodes, forming a cluster of 10 different colors. The top three institutions with the highest TLS were University of California, San Diego (TLS=111), Albert Einstein College of Medicine (TLS=93) and Cleveland Clinic Foundation (TLS=59).

Figure 4: The institution’s citation network visualization map

Analysis of Funding Agencies

The top 10 funding agencies that support IS and intestinal flora research were listed in Table 3. The top three funding agencies were the United States Department of Health and Human Services (313), National Institutes of Health (312) and National Institute of Neurological Disorders and Stroke (199). The top three funding agencies supported the field far more than any other agency. In terms of countries/regions, the United States has the most funded publications, followed by China and Canada.

Table 3: Top 10 funding agencies

Rank

Funding Agencies Number of Publications Countries/Regions
1

United States Department of Health and Human Services

313

USA

2

National Institutes of Health

312 USA
3

National Institute of Neurological Disorders and Stroke

199

USA

4

National natural science foundation of China

165 China
5

National Heart, Lung, and Blood Institute

48

USA

6

Heart and Stroke Foundation of Canada

40 Canada
7

National Institute on Aging

38

USA

8

anadian Institutes of Health Research

36 Canada
9

National Institute of Diabetes, Digestive and Kidney Disease

35

USA

10

UK Research and Innovation

28

USA

Authors Analysis

The top 10 authors published 153 articles(15.07%) about IS and intestinal flora, as shown in Table 4. Among the top 10 authors, Li L, Hazen SL and Tang WHW are the most cited. The two authors with the largest number of publications are Hazen SL and Spence JD.

Table 4: Top 10 authors in research field

Rank

Author Count Representative article in this field Institutions H-index Total citations

TLS

1

Hazen, Stanley L

19

Intestinal microbiota metabolism of L-carnitine, a nutrient in red meatpromotes atherosclerosis Nature Medicine

16

7540

88

2

Wang, Zeneng

15

Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis Nature Medicine

12

7179

71

3

Yin, Jla

13

Dysbiosis of Gut Microbiota With Reduced Trimethylamine-N-Oxide Level in Patients With Large- Artery Atherosclerotic Stroke or Transient Ischemic Attack  

Journal Of The American Heart Association

10

862

63

4

Tang, W H Wilson

11

Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis. Nature Medicine

11

7016

61

 

5

 

He, Yan

 

11

Dysbiosis of Gut Microbiota With Reduced Trimethylamine-N-Oxide Level in Patients With Large- Artery Atherosclerotic Stroke or Transient Ischemic Attack  

Journal Of The American Heart Association

10

871

60

6

Wang, Huidi

10

Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition) Autophagy

9

3930

57

7

Wu, Qiheng

9

Stroke Dysbiosis Index (SDI) in Gut Microbiome Are Associated With Brain Injury and Prognosis of Stroke Frontiers in Neurology

8

396

55

8

Li, Lin

8

Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition) Autophagy

10

8340

54

 

9

 

Zhou, Hongwei

 

8

Dysbiosis of Gut Microbiota With Reduced Trimethylamine-N-Oxide Level in Patients With Large- Artery Atherosclerotic Stroke or Transient Ischemic Attack  

Journal Of The American Heart Association

11

867

53

10

Gao,Xuxuan

7

Stroke Dysbiosis Index (SDI) in Gut Microbiome Are Associated With Brain Injury and Prognosis of Stroke Frontiers in Neurology

8

488

52

Figure 5 is an author co-citation network diagram that has been cited at least 20 times. It contains a total of 14 nodes, 84 links and 2 clusters. The top three authors with the highest TLS are Hazen, Stanley l (TLS=88), Wang, Zeneng (TLS=71) and Yin, Jia (TLS=63). The co-author citation analysis visualization map contains a total of 10,879 nodes, 10,879 links and 8 clusters. The nodes in the graph represent the author, but the difference between the two is that the link between the nodes depends on the collaboration between the authors. The top three authors with the highest TLS were Hazen SL (TLS=970), Spence JD (TLS=369) and Wang Y (TLS=21729). They are at the center of a cooperative relationship. In general, the nodes of the network diagram are scattered, indicating that the cooperation between the authors in this field is not close.

Figure 5: Author co-citation network diagram with at least 20 citations

Journal Analysis

Table 5 lists the top 10 journals published from 2000 to 2023, most of which are from the United States. Frontiers in Neurology had the largest number of publications, followed by Scientific Reports and International Journal of Molecular Sciences. Stroke had the highest impact factor (IF=8.3). According to Journal Citation Reports (JCR) 2023, the impact factors of the top 10 journals ranged from 3.4 in Frontiers in Neurology to 8.3 in Stroke.

Table 5: Top 10 journals from 2000 to 2023

Rank

Journal title Countries/Regions Article Counts Percentage (N/1015) IF (2023) Quartile in category H-index

TLS

1

Frontiers in Neurology USA

22

2.17% 3.4 Q2 22

163

2

Scientific Reports England

22

2.17% 4.6 Q2 33

62

3

International Journal of Molecular Sciences USA

21

2.07% 5.4 Q2 19

63

4

Frontiers in Immunology Switzerland

20

1.97% 7.3 Q1 25

175

5

Stroke USA

19

1.87% 8.3 Q1 19

178

6

Nutrients Australia

19

1.87% 5.9 Q1 10

42

7

Frontiers in Cellular and Infection Microbiology Switzerland

17

1.67% 5.7 Q2 19

134

8

Frontiers in Neuroscience Switzerland

15

1.48% 4.3 Q2 13

108

9

PLOS ONE USA

14

1.38% 3.7 Q2 10

66

10

Journal Of Cerebral Blood Flow And Metabolism England

13

1.28% 6.3 Q1 20

107

Figure 6 shows the visualization of journal co-citation analysis. The top three journals with the highest TLS are Stroke (TLS=187), frontiers in immunology (TLS=175) and frontiers in immunology (TLS=163). Figure 7 shows the double-mapping overlay map of all academic journals. The left side of the map represents the citation journals, the right side of the map represents the cited journals, and the color line represents the citation relationship between the citation journals and the cited journals. The whole map can show the complete citation process. The number of papers published in the journal determines the length of the longitudinal axis of the ellipse, and the number of authors determines the length of the transverse axis. The orange citation path indicates that Molecular/ Biology/Immunology research is frequently cited in Molecular/ Biology/Genetics journals. The green path indicates that research on Medicine/Medical/Clinical is often cited by Medicine/Medical/ Genetics journals.

Figure 6: The visualization of journal co-citation analysis

Figure 7: The double mapping overlay of all academic journals

Analysis References

Figure 8 shows the co-citation network visualization of the literature generated by VOS viewer, and lists the top 10 most cited articles related to IS and intestinal flora research in Table 6. There are 11300 links and 172 nodes, forming four clusters of different colors. In these clusters, the total link strength with other cited references was calculated. The highest TLS was an article published by Benakis C et al. in 2016 (TLS=2976), followed by articles published by Singh V et al. (TLS=2959, 2016), Yin J et al. (TLS=2695, 2015), Wang Zn et al. (TLS=2100, 2011). Three of these 10 articles were published in nat med. The most frequently cited article in this field was an article published by Benakis C [12] on the effect of symbiotic microbiota on the outcome of ischemic stroke by regulating intestinal T cells.

Figure 8: Visualization diagram of literature co-citation network

Table 6: Top 10 most cited articles

Rank

Title Total citations First author Publication Year Journal

TLS

1

Commensal microbiota affects ischemic stroke outcome by regulating intestinal gamma delta T cells

186

Benakis C

2016

Nature Medicine

2976

2

Microbiota Dysbiosis Controls the Neuroinflammatory Response after Stroke

184

Singh V

2016

JNeurosci

2959

3

Prognostic value of choline and betaine depends on intestinal microbiota-generated metabolite trimethylamine-N-oxide

158

Wang zn

2011

nature

2100

4

Dysbiosis of Gut Microbiota With Reduced Trimethylamine-N-Oxide Level in Patients With Large-Artery Atherosclerotic Stroke or Transient Ischemic Attack

153

Yin j

2015

Journal of the American Heart Association

2695

5

Intestinal Microbial Metabolism of Phosphatidylcholine and Cardiovascular Risk

145

Tang whw

2013

New England Journal of Medicine

1973

6

Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis

140

Koeth ra

2013

Nature Medicine

1849

7

Gut Microbial Metabolite TMAO Enhances Platelet Hyperreactivity and Thrombosis Risk

119

Zhu WF

2016

Cell

1868

8

Translocation and dissemination of commensal bacteria in post-stroke infection

101

Stanley d

2016

Nature Medicine

1794

9

Host microbiota constantly control maturation and function of microglia in the CNS

100

Erny d

2015

Nature Neuroscience

1743

10

Age-related changes in the gut microbiota influence systemic inflammation and stroke outcome

96

Spychala ms

2018

Annals Of Neurology

1759

We also observe from Figure 9 that the top 20 references with the strongest outbreak were cited in the study of IS and intestinal flora. The articles with the strongest explosive power are: Koeth RA [13] published in 2013: Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis.

Figure 9: Top 20 references with the strongest outbreak

Keywords Analysis

Keyword Co-occurrence Analysis

In bibliometrics, keywords are a very important part. Keyword co-occurrence analysis can reveal changing research topics and development trends. The density visualization map generated by co-occurrence of keywords more than 10 times is shown in Figure 10. The more frequent the keywords appear, the darker the color. In addition to the ‘ischemic stroke’ and ‘intestinal flora’ contained in the search terms, a total of 545 keywords appeared as nodes. Table 7 shows that the most common keywords are ‘risk’, ‘disease’, ‘inflammation’ and ‘chain fatty acid’.

Figure 10: Keyword visualization of co-occurrence of keywords more than 10 times

Table 7: Top 20 keywords of

Rank

Keyword Counts Rank Keyword

Counts

1

risk

116

11

traditional chinese medicine

45

2

disease

99

12

atherosclerosis

42

3

inflammation

95

13

central nervous system

39

4

chain fatty acid

82

14

multiple sclerosis

31

5

metabolism

78

15

fecal microbiota transplantation

21

6

trimethylamine n oxide

62

16

bile acid

17

7

phosphatidylcholine

54

17

blood brain barrier

14

8

dysbiosis

50

18

microglia

13

9

blood pressure

47

19

microbiota-gut-brain axi

12

10

oxidative stress

47

20

ketogenic diet

11

Keyword Cluster Analysis

Cluster analysis is carried out on the basis of keyword co- occurrence graph. The more nodes the cluster contains, the smaller the cluster number is. The two indexes of module value (Q value) and average contour value (S value) are used as the evidence to judge the clustering effect of the graph. Q value > 0.3 indicates that the clustering structure is significant ; clustering average contour value S value > 0.5, clustering is generally considered to be reasonable. In this study, the LLR model was used to cluster the keywords, Q value=0.5205, S value=0.6911. It can be considered that the clustering results are within a reasonable range, as shown in Figure 11.

Figure 11: Keyword cluster visualization

Keyword Burst Analysis

This study lists the top 13 burst keywords, see Figure 12. The most intense burst keywords are ‘coronary heart disease’ (intensity=6.14), followed by ‘mediterranean diet’ (intensity=5.29) and ‘myocardial infarction’ (intensity=5.03). ‘Coronary heart disease’ is the earliest emerging keyword, and the emerging keywords from 2022 to 2023 are ‘fecal microbiota transplantation’, ‘immune’ and ‘cerebral ischemia’ The map shows that there are three keywords that are still in the current stage of the ongoing process.

Figure 12: Studies the top 13 keywords with the strongest citation burst

Discussion

Global Research Trends of Ischemic Stroke and Intestinal Flora

This study conducted a bibliometric analysis of IS and intestinal flora. The number of citations showed a continuous but unstable growth trend year by year. These results show that from the overall trend of the number of papers published in this field, more and more scholars pay attention to the role of pathogenesis in this field, especially in recent years, the number of papers published has increased significantly. Therefore, it can be inferred that in recent years, people’s understanding of this field has become more mature, relevant basic research has become more and more, and the prevention and control of this field has become a hot spot and trend all over the world.

In terms of countries/regions, the United States is the dominant contributor to the number of published articles (436), followed by China (310) and Canada (98), while the United States is far ahead of other countries in the number of citations (39735), which can be said to be in a dominant position in this field. In terms of authoritative institutions, the top 10 institutions are composed of 9 American institutions and 1 Chinese institution. According to international cooperation, the University of California System in the United States has relatively close cooperation with other institutions. Although a wide range of cooperation has been established between countries and institutions, future research involving IS and intestinal flora should focus on international cooperation and carry out multi-center, large- sample studies.

Scientific research and innovation need a lot of financial, human and material support. The United States Department Of Health Human Services is the funding agency that funds the most research projects in this field, so the support of funding agencies is one of the reasons why the United States has achieved a high academic status in this field. At the same time, it is of great significance to prove the research on IS and intestinal flora. Because more and more institutions invest a lot of money to conduct in-depth research and explore their deep cognition and prevention, there will be greater financial support to encourage high-level institutions to contribute to scientific research.

According to the survey of author information, it can be found that Hazen SL has the highest H index. In terms of authoritative journals, Frontiers in Neurology (22 articles), Scientific Reports (22 articles), and International Journal of Molecular Sciences (21 articles) contribute the most to the number of published papers. Among the top 10 journals, Q2 accounted for 60% and Q1 accounted for 40%, indicating that the quality of research on IS and intestinal flora still needs to be strengthened. PLOS ONE had the most citations (1000) and the highest average number of citations (71.43 times). The highest H index value appears in Frontiers in Neurology. In addition, four of the top 10 journals have IF values of 3-5 (Frontiers in Neurology, Scientific Reports, Frontiers in Neuroscience and PLOS ONE). The IF values of 4 journals were 5-7 (International Journal of Molecular Sciences, Nutrients, Frontiers in Cellular and Infection Microbiology, Journal Of Cerebral Blood Flow And Metabolism), and the IF values of 2 journals were 7-8 (Frontiers in Immunology, Stroke).

Research Hotspots and Frontiers of IS and Intestinal Flora

Keyword analysis can reflect the core and research points of a literature. On the basis of in-depth analysis of keyword co-occurrence, it can quickly determine the research hotspots and development trends in a field. Through the visual clustering analysis of keywords, combined with color clustering diagram and emergent graph, the current research hotspots and frontiers are analyzed [14]. From the results, it can be seen that in the occurrence and development of IS, the imbalance of intestinal flora mediated by short-chain fatty acids, trimethylamine nitrogen oxide, brain-gut axis, immunity and neuroinflammation play a key role in the occurrence and development of IS. Fecal microbiota transplantation technology is also a research hotspot in this field. We will analyze it from the perspectives of short- chain fatty acids, trimethylamine nitrogen oxide, brain-gut axis, ketogenic diet, fecal microbiota transplantation, and natural products. The analysis results are summarized as follows:

The Effect of Short Chain Fatty Acids (SCFAs) on IS

SCFAs are the ‘protectors’ of the occurrence and development of stroke. The mechanism of action is to regulate microglia, neurotrophic factors, blood-brain barrier (BBB), neuro inflammation and neuronal apoptosis [15]. SCFAs mainly cross the cell membrane in a pH- dependent manner, and are transported across the cell membrane mediated by hydrogen-coupled or sodium-coupled monocarboxylic acid transporters, which can cause apoptosis by regulating the NF- kappa B signaling pathway, thus playing a protective role in brain injury. Under physiological conditions, SCFAs, the main metabolites of intestinal flora, can affect the expression of B-cell lymphoma-2, BH3 interacting domain death agonist, Fas cell surface death receptor, Necdin and Vascular endothelial growth factor A related to neurogenesis, proliferation and apoptosis, and promote the growth of human neural progenitor cells and the differentiation of embryonic stem cells into neurons [16]. In addition, the regulation of SCFAs on brain function may be related to its regulation of neurotransmitters and NF-κB signaling pathway. Studies have confirmed that SCFAs can enter the blood-brain barrier through blood flow and act directly on the blood-brain barrier [17]. Studies have shown that sodium butyrate can not only inhibit histone deacetylase, but also increase the expression of TrkB receptor in the injured hemisphere and the phosphorylation of transcription factor cyclic adenosine monophosphate effector element binding protein, and promote the occurrence of ipsilateral hemisphere neurons through BDNF-TrkB signaling pathway, increase synaptic plasticity, and ultimately improve the neurological function of neonatal hypoxic-ischemic rats [18].

The Effect of Trimethylamine Nitrogen Oxide (TMAO) on IS

TMAO is a gut-derived microbial metabolite. When the body ingests choline, it decomposes the C-N bond in the product to form trimethylamine (TMA). TMA enters the liver through the liver and intestinal circulation system, and generates TMAO under the oxidation of flavin monooxygenase. TMAO can cause thrombosis, platelet aggregation, vascular endothelial injury, lipid metabolism, inflammation and other diseases, and the increase of TMAO concentration can lead to severe cerebrovascular disease. In addition, for patients with diabetes, first stroke and peripheral arterial disease, the risk of long-term death also has a significant correlation. TMAO may affect the recovery of neurological function after cerebral ischemia by promoting astrocyte activation and glial scar formation. In addition, there is also a certain relationship between TMAO content and stroke recurrence. Recent studies have found that the concentration of TMAO increased significantly within 72 hours after cerebral ischemia, which is an important risk factor for recurrent vascular events 3 months after cerebral ischemia-reperfusion. Although the current study has confirmed the change of TMAO level after stroke, the change of TMAO before stroke can not be determined, and the long-term effect of TMAO on stroke patients still needs further observation [19-21].

The Effect of Gut-Brain Axis on IS

Studies have found that there is a two-way communication and interaction between the intestine and the brain. The intestinal flora can exchange information with the brain through neural pathways, neurotransmitter endocrine pathways, immune pathways, cellular metabolites, and host metabolic pathways, that is, the‘gut-brain axis’ [22]. After ischemic brain injury, GBA in the brain transmits signals to the intestine, leading to intestinal inflammation, decreased intestinal motility, mucosal barrier destruction, increased permeability, and intestinal flora translocation. Studies have found that the diversity of intestinal flora is reduced, the proportion of Bacteroidetes and Firmicutes is changed, and the abundance of beneficial bacteria such as Lactobacillus and Bifidobacterium is reduced, which may further aggravate brain injury [23]. The gut-brain axis affects the immune function of the body by regulating the number of regulatory T cells and IL-17+γδT cells, leading to the occurrence of cerebral ischemia. The ‘gut-brain axis’ caused by IS can promote the migration of T lymphocytes from the intestine to the brain, increase the secretion of γδT cells and IL-17 in the brain, decrease the secretion of Treg cells and IL-10, cause systemic and central nervous system inflammation, and aggravate brain nerve injury [24,25].

Effects of Ketogenic Diet on IS

Ketogenic diet is mainly composed of low carbon, high fat and suitable protein. It has a good therapeutic effect on nervous system diseases, especially intractable epilepsy, neurodegenerative diseases, mental and psychological diseases and so on [26]. As an important source of energy, ketone bodies can be fully utilized in neurons, glial cells and other tissues, so they have been widely used in neurological diseases [27]. In addition, ketogenic diet can also affect the intestinal immune function by regulating the intestinal microbial community, thus affecting the inflammatory response of brain tissue. It has been found that ketogenic diet can significantly change the intestinal microorganisms of rats, reduce the abundance and α diversity of intestinal microorganisms in rats, and significantly increase the content of Akkermansia-muciniphila and Parabacteroides in rats. Studies have shown that ketogenic diet and β-hydroxybutyrate (BHB) have protective effects on cerebral ischemia [28,29]

Fecal Bacteria Transplantation Technology and Its Effect on IS

In  recent  years,  with  the  emergence  of  fecal  bacterial transplantation and the concept of intestinal microecology, there has been a new understanding of the interaction between flora and human body. The micro-ecological system of the human body consists of four systems: oral cavity, skin, urinary system and gastrointestinal tract. Among these four systems, the number and structure of microorganisms colonized in the intestinal microecosystem are the most complex, and they have the greatest impact on the human body. The first application of modern western medicine fecal bacteria transplantation technology originated from the University of Colorado School of Medicine in the United States. In 1958, it was first used in 4 patients with pseudomembranous colitis and successfully cured. Wang used fecal bacterial transplantation technology to confirm that different genders of intestinal flora are related to the outcome of cerebral infarction in animal models of cerebral infarction. It was also found that giving female intestinal flora could significantly improve the survival rate of mice, reduce the infarct area, improve behavioral performance, promote the secretion of beneficial metabolites, and reduce the inflammatory response. In contrast, the protective effect of male intestinal flora on mice was weaker. Studies have confirmed that fecal microbiota transplantation can significantly improve the structure of intestinal flora in patients with CI, reduce the number of pathogenic bacteria, increase the number of probiotics, reduce nerve injury, reduce cerebral edema, and reduce the volume of cerebral infarction [30-34].

Effect of Natural Products on Intestinal Flora in the Treatment of Ischemic Stroke

Traditional Chinese medicine(TCM) has attracted much attention in the field of regulating intestinal microecology and repairing intestinal barrier due to its mild bacteriostatic effect, repair effect and not easy to cause human drug resistance. TCM can enhance the immunity of the body, resist the invasion of foreign bacteria, and also adjust the level of pro-inflammatory and anti-inflammatory factors in the body, so as to achieve the purpose of inhibiting intestinal inflammation [35-37]. What’s more, TCM can regulate the number and secretory function of intestinal mucosal epithelial cells, provide a suitable growth environment for specific flora, and inhibit other flora, thereby affecting the secretion and layer components of mucus by improving the microcirculation of the intestinal mucosa, repairing the integrity of the intestinal mucosa, reducing the permeability of the intestinal mucosa to maintain the mechanical barrier function. Increasing the number of dominant microorganisms and maintaining the balance between them and the host are important ways to repair the biological barrier [38,39]. Studies have shown that the compatibility of Puerariae Lobatae Radix and Chuanxiong Rhizoma can improve the increase of intestinal mucosal permeability, brain-gut barrier injury and has a good therapeutic effect on brain injury caused by cerebral ischemia. It has also been reported that the compatibility of astragalus and saffiower can protect the integrity of the blood-brain barrier and reduce cerebral ischemic injury by regulating intestinal microecology, activating bile acid receptors, maintaining bile acid homeostasis, and reducing inflammatory reactions in the brain [40].

TCM has good intestinal mucosal barrier and intestinal microecological recovery function. However, some TCM can also cause certain damage to the intestine while achieving curative effect. It has been proved that soyasaponins can reduce intestinal mucosal folds, promote the proliferation and apoptosis of intestinal epithelial cells, increase the permeability of intestinal mucosa, break the cell connection, and damage the antioxidant function of intestinal mucosa, thus causing intestinal mucosal damage. In addition, the diameter of the active ingredients, original drugs and compound of TCM prepared by nanotechnology is not more than 100 nm. The research of nano-Chinese medicine involves a variety of techniques such as nano-carriers and solid dispersion systems. This method can not only realize the nanometer grinding of the drug, but also make the effective components or the effective components of the drug nano- treatment to have a new effect. It is expected to achieve a breakthrough in the treatment of IS [41-44].

Marine natural products have a multi-target agent effect and can synergistically regulate a variety of intestinal and intestinal-related diseases. Studies had confirmed the therapeutic effect of carotenoids, polysaccharides, phytosterols, terpenes, phenols, alkaloids and other active ingredients on neurodegenerative diseases, and explored its mechanism of action. Natural substances in the ocean can reduce the relative content of harmful transgenes, increase beneficial transgenes, and regulate inflammatory mediators, apoptosis, and oxidative stress in the intestine [46]. Because the intestine and the brain interact with each other, regulating the signal transduction pathway in the intestine can make it play a neuroprotective role in the brain. It was found that astaxanthin could inhibit the expression of MyD88, TLR4 and p-p65, and up-regulate the expression of p65. Astaxanthin has the function of simultaneously regulating the two organs of intestine and brain. It is speculated that it may be an ideal candidate for regulating intestinal- brain axial neuroprotection [45-48].

Limitation

We conducted a visual analysis on the WoSCC database and found that: (1) The data we collected is limited to the data between July 2000 and 2023, and the real data will change according to the update of the database. (2) Because the existing bibliometrics software can not identify the author’s initials, so in the author analysis of the article, there may be some incorrect results; (3) Because the search scope of this paper is limited to the SCI-E index database of WOS, the documents that are not included in the SCI-E index database are not included in the analysis scope of this paper. However, the research results of this project will help us better understand the mechanism of IS and intestinal flora, and provide new ideas and methods for further exploration of this issue in the future.

Conclusion

Based on the WoSCC database, this study conducted a bibliometric analysis of 1015 studies published from 2000 to 2023 on the relationship between intestinal flora and the incidence of IS. The results showed that the number of publications on the relationship between intestinal flora and IS in the past literature showed an increasing trend year by year. Globally, China and the United States are the leading countries in this field, and they are also the countries with the most cooperation and exchanges. Southern Medical University is the research institution that has the greatest impact on research results. Hazen and Stanley L are the authors with high publications in this field. Frontiers in Neurology may be the most popular journal in this field. At present, most of the published articles on the study of IS and intestinal flora are cited from internationally influential journals. Short-chain fatty acids, trimethylamine nitrogen oxide, brain-gut axis, ketogenic diet, and fecal microbiota transplantation are the hotspots and frontiers in the study of intestinal flora and IS. Further study on the relationship between intestinal flora and IS will promote the treatment of IS.

Acknowledgments

This study was supported by Guangxi University of Chinese Medicine (NO.2021QN010), Projects to improve the basic scientific research capacity of young and middle-aged people (NO.2022KY0301) and Guangxi first-class discipline Clinical basis of Traditional Chinese Medicine (TCM) (NO.2019XK060).

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Figuring Out Brain Fog: A Neurocounseling Approach to Personalized Menopausal Mental Health Care

DOI: 10.31038/AWHC.2024743

Abstract

A woman’s transition through menopause is a multifaceted experience that encompasses more than just the end of reproductive capacity. It presents unique challenges and opportunities for mental health scholars and practitioners. Importantly, hormonal fluctuations that occur during menopause impact a woman’s neurological and cognitive functioning. As a result, women may experience a variety of cognitive challenges commonly collectively referred to as brain fog. To this end, brain fog is a hallmark symptom of menopause. The application of neurocounseling to menopausal mental health care presents a novel pathway for holistic, personalized treatment. This article presents current information regarding cognition during menopause and neurocounseling. The article concludes with recommendations for the application of neurocounseling as a treatment approach for brain fog within a menopausal mental health care.

Keywords

Menopause, Brain fog, Cognition, Neurocounseling, Neuroscience, Mental health

Cognition During Menopause

During menopause, many women experience noticeable changes in cognition, often referred to as brain fog . These cognitive changes are largely influenced by hormonal fluctuations, particularly the decline in estrogen, which affects brain function. Estrogen plays a key role in cognitive processes, including memory, attention, and learning. As estrogen levels drop during perimenopause, women may face several cognitive challenges. For example, many women report memory problems such as forgetfulness or difficulty recalling information, especially short-term memory issues. A decline in attention span and focus is common, making it harder to concentrate and complete tasks that require sustained attention. During this time some women notice that it takes longer to think through tasks or solve problems than before suggesting that some perimenopausal women have a lower processing speed. In addition, perimenopausal women may struggle to find the right words during conversations, leading to feelings of frustration. Overall, many women experience a general sense of mental cloudiness or difficulty thinking clearly, affecting problem-solving and decision-making during menopause, and perimenopause in particular [1-5].

These cognitive changes can affect daily life and work, contributing to emotional distress such as anxiety and frustration. This is further exacerbated by the fact that there is no universal assessment or benchmark for the onset of perimenopause [5]. Thus, brain fog is many women’s first encounter with the symptoms of menopause. As a result, many women struggle to detect their symptoms as those of menopause and not simply aging or stress [6]. While this may be inconsequential for some women, the lack of knowledge and preparedness can create significant psychological distress for others. For most women, cognitive changes are temporary and tend to improve post-menopause. Nevertheless, the impairment can last years as a women undergoes perimenopause and be quite debilitating [5]. Lifestyle interventions like exercise, healthy diet, mental stimulation, and stress management can help mitigate cognitive difficulties during this phase. Moreover, menopausal hormone therapy (MHT), such as the use of prescribed estrogen via patches, pills, vaginal creams, combined estrogen-progesterone pills, gel-based applications, and certain intrauterine devices (IUDs), can help mitigate the underlying hormonal cause of cogntitive impairment. However, these interventions do not address the neurological aspects of a woman’s hormonal fluctuations that contribute to psychological distress [1,7].

Neurocounseling

Neurocounseling is an interdisciplinary approach that integrates neuroscience with counseling practices to better understand and address mental health issues. It focuses on how brain function and neurological processes influence behavior, emotions, cognition, and overall mental health. By incorporating knowledge of the brain and nervous system, neurocounseling helps mental health practitioners design more effective interventions tailored to the biological underpinnings of a person’s mental health challenges [8,9].

The neurocounseling approach involves using tools like brain imaging studies, neurofeedback, mindfulness practices, and cognitive-behavioral strategies to promote positive changes in brain functioning and emotional regulation. The goal is to help patients and clients improve their mental health by combining traditional therapeutic methods with insights from neuroscience, fostering a deeper understanding of how the brain and nervous system respond to therapy. Neurocounseling is particularly useful in treating conditions such as anxiety, depression, trauma, ADHD, and other disorders where brain function plays a critical role. The use of neurocounseling to support menopausal women is relatively unexamined [10-12].

Implications for Menopausal Mental Health Care

Mental health practitioners can use neurocounseling to effectively treat cognitive challenges such as brain fog during menopause by incorporating neuroscience-based techniques that target both the brain and behavior. Given that cognitive changes during menopause, such as memory issues, difficulty concentrating, and brain fog, are often linked to hormonal fluctuations, neurocounseling offers a holistic and empowering approach to managing these challenges. A summary of how six aspects of neurocounseling can be used to address cognitive aspects of menopausal mental health follows.

Psychoeducation

Psychoeducation is an integral aspect of neurocounseling [11]. Mental health practitioners can educate patients and clients about the neurological basis of cognitive changes during menopause, helping them understand that these difficulties are normal and often temporary. This awareness can reduce anxiety and foster a more compassionate view of their menopausal experience.

Cognitive-behavioral Therapy (CBT)

Neurocounseling can integrate CBT techniques to help clients and patients manage negative thought patterns that may arise from cognitive struggles [10]. For example, women who feel frustrated by forgetfulness can learn strategies to reframe their experiences and reduce the emotional burden associated with menopausal cognitive challenges.

Mindfulness and Relaxation Techniques

Since stress exacerbates cognitive decline, mental health practitioners can teach mindfulness-based stress reduction (MBSR) and relaxation techniques [13]. Mindfulness has been shown to positively affect brain plasticity, promoting cognitive resilience by enhancing focus, attention, and emotional regulation. For women undergoing cognitive changes due to menopause, MBSR can be particularly useful, empowering women to assert greater control their attention and emotional regulation.

Neurofeedback

This tool allows patients and clients to monitor their brain activity in real time and learn how to regulate their brain waves. Neurofeedback can improve concentration, memory, and mental clarity, which are often impacted by menopause [10].

Memory and Attention Training

Mental health practitioners can use brain-based exercises to strengthen cognitive functions such as working memory and attention. Techniques like brain games, puzzles, and structured mental exercises can improve cognitive flexibility and processing speed [14]. As a tool within the neurocounseling framework, memory and attention training can empower women while creating an entertaining outlet. The latter may be particularly important given that many women report an increase in social isolation and a decreased participation in pleasurable activities during the menopausal transition [15].

Lifestyle Guidance

Neurocounseling emphasizes the connection between brain health and lifestyle choices. Mental health practitioners can encourage physical exercise, proper nutrition, and adequate sleep, all of which are linked to better cognitive function. They may also recommend activities that stimulate the brain, like reading, puzzles, or learning new skills, which promote neuroplasticity and cognitive improvement [13].

Conclusion

By using neurocounseling, mental health practitioners can offer women experiencing cognitive difficulties during menopause a comprehensive treatment plan that addresses both the psychological and neurological aspects of their symptoms, helping them regain confidence and mental clarity. For patients who can and are willing to take MHT, mental health practitioners using neurocounseling approach can work collaboratively with a woman’s medical healthcare provider who can prescribe MHT [1]. In this case, a combination of MHT along with neurocounseling presents a meaningful clinical pathway for the treatment of hormonal fluctuations, psychological implications, and neurological aspects of cognitive concerns among menopausal women. Women who are unable or unwilling to take MHT can also benefit from neurocounseling for symptom management and improved quality of life.

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Scale-Up Factors in the Development and Commercial Execution of Oral Solid Dosage Forms: A Current Industry Perspective

DOI: 10.31038/JPPR.2024714

Abstract

In the pharmaceutical industry, a major challenge is ensuring consistent quality of finished products as the batch scale shifts from laboratory to pilot to commercial levels. This review article aims to provide insights into the current industry practices and understanding of scale-up calculations and factors involved in the production of oral solid dosage forms. Pharmaceutical manufacturing encompasses various unit operations for oral solid dosage forms, including blending, wet granulation, dry granulation via roller compaction, milling, compression, and coating processes such as Wurster and film coating. Each unit operation’s parameters significantly influence the final product’s quality. As batch sizes increase, it becomes crucial to control various process parameters strategically to maintain product consistency. This article discusses the application of scale-up and scale-down calculations throughout different stages of unit operations, highlights the importance of scale-up factors in technology transfer from pilot to commercial scales, and reviews the current methodologies and industry perspectives on scale-up practices.

Keywords

Scale-up, Pharmaceutical industry, Oral solid dosage forms, Granulation, Compression, Film coating

Introduction

Oral solid dosage forms are final drug products designed to be ingested orally. Once swallowed, these forms dissolve in the gastrointestinal tract and the active ingredients are absorbed into the bloodstream. Examples of oral solid dosage forms include powders, granules, tablets, capsules, soft gels, gummies, dispersible films, and pills. These dosage forms are preferred for several reasons: they are relatively easy to administer, they can be clearly distinguished from one another, and their manufacturing processes are well-established and understood. Among oral solid dosage forms, tablets and capsules are the most common. Both consist of an active pharmaceutical ingredient (API), also known as the drug substance, along with various excipients. The manufacturing process for these dosage forms involves several unit operations, including blending, wet granulation (using a rapid mixer granulator or fluid bed processor), dry granulation (via roller compaction), milling, compression, Wurster coating, and film coating [1,2].During the early stages of drug product development, formulations and processes are created using active pharmaceutical ingredients (APIs) and excipients to ensure the quality, safety, and efficacy of the final drug products at the laboratory scale [3]. Once this formulation is established, the process is scaled up from the laboratory to pilot and eventually to commercial scales [4,5]. Throughout this technology transfer, the laboratory-scale formulation is generally finalized and remains unchanged, while process parameters are adjusted. For instance, as the scale of the granulation container increases, both the powder weight and the sizes of components like the impeller and chopper, as well as operational parameters, may need adjustment. These changes can impact the quality of the finished product [6]. Successful scale-up relies on a thorough understanding of the process parameters and the ability to adjust them appropriately to maintain the same quality observed at the laboratory scale.

Successful scale-up of a manufacturing process hinges on a deep understanding of the fundamental principles and insights into each unit operation, which are derived from mechanical insights into the process. The Food and Drug Administration (FDA) has introduced the Quality by Design (QbD) approach to facilitate the efficient and timely production of high-quality pharmaceutical products [7,8]. According to the International Conference on Harmonisation (ICH) guidelines specifically ICH Q8 (Pharmaceutical Development), ICH Q9 (Quality Risk Management), and ICH Q10 (Pharmaceutical Quality System) the scale-up process should be conducted to ensure product quality in alignment with the QbD principles. To meet these regulatory requirements, it is essential to establish methods for reducing variability during scale-up through a systematic understanding of the manufacturing process and the application of the QbD approach [9]. This review examines the application of mathematical considerations in scale-up calculations and explores various methodologies used in scaling up different unit operations for oral solid dosage forms. It aims to provide a systematic strategy to ensure the quality of finished dosage forms in the pharmaceutical industry.

Methods

Scale Up Process Basic Understanding

Using scientific approaches and mathematical calculations for process scale-up or scale-down can significantly reduce the risk of failure, ensure regulatory compliance, and lower costs associated with trial batches. These calculations help to establish robust and realistic parameters for scaling up or down pharmaceutical formulations [10]. When scaling unit process parameters, key considerations include equipment size, shape, working principle, and associated parameters. According to process modeling theory, processes are deemed similar if they exhibit geometric, kinematic, or dynamic similarity.

Scale-Up Strategy for Oral Solid Dosage Forms

The manufacturing of oral solid dosage forms tablets and capsules involves several key unit operations such as blending, granulation, milling, tableting, Wurster coating and film coating. Each of these operations requires a carefully planned scale-up strategy to ensure product quality and process efficiency. Detailed overview of the scale- up strategy for each unit operation are discussed.

A) Blending/Mixing in Pharmaceutical Manufacturing

Blending is a critical unit operation in the manufacture of oral solid dosage forms (e.g., tablets and capsules). It ensures uniformity of the final product by mixing active pharmaceutical ingredients (APIs) with excipients. Equipment used in pharmaceutical blending unit operations are Double-Cone Blenders, Bin Blenders, Octagonal Blenders, V-Blenders and Cubic Blenders [11,12]. The blend should have a degree of homogeneity during blending to ensure the quality of solid dosage forms, such as tablets and capsules [13,14]. The blend homogeneity is influenced by several factors, such as material attributes (for example particle size distribution, particle shape, density, surface properties, particle cohesive strength) and process parameters (for example blender design, rotational speed, occupancy level, and blending time) [15]. These factors affect the agglomeration and segregation of the blend during the blending process, which affect the blend homogeneity. However, experiments with appropriate scale up calculations are sufficient to confirm changes in the agglomeration and segregation of the blend caused by these factors [16]. Scale up considerations and current industry practices in scale up calculations for blending unit operations are presented in Table 1a. Different types of blenders (Figure 1) such as Mass Blenders, Ribbon Blenders, V Cone Blenders, Double Cone Blender, Octagonal Blender, Drum Blender, Bin Blenders and Vertical Blenders, working principles, key factors and advantages are presented in Table 1b.

Table 1a: Process parameters, quality attributes, scale up considerations and industry practices for Blending unit operation.

   

Figure 1: Different types of Pilot/commercial scale model blenders used in pharmaceutical blending unit operation; 1. Mass Blenders; 2. Ribbon Blender; 3. V Cone Blenders; 4. Double Cone Blender; 5. Octagonal Blender; 6. Drum Blender; 7. Bin Blender; 8. Vertical Blender.

Table 1b: Different types of blenders in pharmaceuticals and its working principles, key factors and advantages.

 

B) Granulation in Pharmaceutical Manufacturing

Granulation is a crucial process in the pharmaceutical industry, particularly in the manufacture of solid dosage forms like tablets and capsules. It involves the formation of granules from a mixture of powders, which can improve the properties of the final product. Purpose of Granulation is to improve flow properties, enhance compressibility, reduce dust and improve uniformity [17,18]. Currently pharmaceutical industry adapted different types of granulation methods such as

i). Dry Granulation

Involves compressing powders into slugs or sheets and then milling them into granules. This method is used when the API is sensitive to moisture or heat. The process includes roller compaction and slugging. Typically roller compactors are used in dry granulation process.

ii). Wet Granulation

Involves adding a liquid binder to the powder mixture, which forms a wet mass that is then dried and sized into granules. This method typically includes preparation of binder solution, granulation, drying and sizing. Typically high shear rapid mixer granulators are used for wet granulation.

iii). Semi-Wet Granulation

A combination of wet and dry process involves in this granulation techniques, where a small amount of liquid binder is used, and the granules are only partially dried. Typically low shear fluid bed granulators are used in semi-wet granulation process.

i). Dry Granulation – Scale-Up Consideration and Industry Perspectives

Dry granulation is an alternative to both direct compression and wet granulation, particularly suited for active pharmaceutical ingredients (APIs) that are sensitive to moisture, have poor flow properties, or possess other physicochemical characteristics that are incompatible with direct compression or wet granulation. Unlike wet granulation, dry granulation does not involve the use of solvents or additional heating, which can introduce challenges related to physical or chemical stability, especially in formulations with amorphous solid dispersions or those prone to chemical degradation. Dry granulation offers several advantages over wet granulation, including a simpler process that is particularly beneficial for APIs that are sensitive to heat or water [19]. The two most commonly used methods for dry granulation are roller compaction and slugging.

Roller Compaction (RC) is a dry granulation technique that simultaneously densifies and agglomerates the powder blend to achieve increased packing density and granule size. In this process, the blend is compacted into ribbons using rollers, which are then milled into granules. Roller compaction reduces the risk of segregation, minimizes dust formation, and produces ribbons that can be processed into granules with improved flow properties. These granules are suitable for various subsequent processes, such as sachet filling, capsule filling, or tableting. Different scales and schematic representation of the roller compaction process is depicted in the Figure 2.

Figure 2: Different types of Roller compacters a) Lab scale model b) Pilot/Commercial Scale c) Schematic presentation of Roller Compactor.

Scaling up of roller compaction involves utilizing traditional large- scale experimental designs to optimize the dry granulation process. This approach can be time-consuming and resource-intensive. To streamline scale-up and minimize the number of experiments, it is crucial to have a deep understanding of the process parameters and the attributes of both the ribbons and granules produced [20]. Key process parameters for roller compaction include roll gap, roll pressure, feed screw speed, roll speed, and roller shape. These parameters must be carefully adjusted to achieve the desired granulation outcomes [21]. The quality of the ribbon, which is the primary product of the roller compaction process, is assessed based on several attributes like Ribbon Density (an indicator of how compacted ribbon is), Ribbon Strength (reflects the mechanical strength of the ribbon), Ribbon Thickness (Affects the granule size and uniformity), Young’s Modulus (Measures the ribbon’s elasticity and rigidity), Ribbon Shape (Impacts the subsequent granule formation), and Moisture Content (Ensures the ribbon’s stability and suitability for further processing). By focusing on these parameters and attributes, it is possible to optimize the roller compaction process effectively while reducing the need for extensive experimentation. The rolling theory for granular solids developed by Johanson describes the pressure distribution along the rolls considering the physical characteristics of the powder and the equipment geometry. The dimensionless number frequently used in roller compaction is determined based on the Johanson theory [22]. Johanson proposed a model that predicts the density of ribbons made by roller compaction using the nip area and the volume between the roll gaps. Johanson proposed distinguishing two regions between the rolls, (i) a slip region where the roll speed is faster than the powder and there is only rearrangement of the particles and (ii) a nonslip region where the powder gets trapped between the rolls and becomes increasingly compacted until the gap. The transition from slip to nonslip region is defined by the so-called nip angle. In the nonslip region, it is assumed that the powder behaves as a solid body being deformed as the distance between the rolls narrows down to the gap. It is further assumed that the deformation has only one axial component such that it can be idealized as uniaxial compression. One source of discrepancy between the predictions of Johanson’s and Reynolds’ model and the ribbon density measurements is the different compaction behaviour of the powder in the roller compactor compared to uniaxial compression tests [23,24] demonstrated that the roller compactor and a compaction simulator lead to different ribbon densities and built a model to account for that difference.

Rowe et al. extended Johanson’s model and proposed a modified Bingham number (Bm*) that represented the ratio of yield point to yield stress as follows:

Where Cs is the screw speed constant, 0 is pre consolidation factor, ρtrue is true density, is circumference of the roll circle, D is the roll diameter, W is roll width, SA roll is roll surface area, S is roll gap, NS is feed screw speed and NR is roll speed. Bm* is easy to determine because the input parameters of Bm*consist of those that can be generally measured in the compaction process. The model- predicted values and the actual test results from WP 120 Pharma and WP 200 Pharma (Alexander werk, Remscheid, Germany) models are shown. By maintaining Bm*, it was possible to obtain a consistent ribbon density between the two operating scales. It was suggested that Bm* can be effectively used for the development of roller compaction scale-up [25]. Case studies suggest that dimensionless numbers for the prediction of ribbon density in dry granulation processes can be used successfully during the Scale-up process (Table 2).

Table 2: Critical process parameters, quality attributes, scale up considerations and industry practices for Roller compaction unit operation.

 

ii). Wet Granulation – Scale-Up Consideration and Industry Perspectives

Wet granulation is a key process in pharmaceutical manufacturing used to produce granules from powders by incorporating a liquid binder (Figure 3).

Figure 3: Different types of wet granulation process equipments used in pharmaceutical development a) Lab model rapid mixer granulator b) Pilot/Commercial scale rapid mixer granulator.

This process is crucial for ensuring that the final granules exhibit desirable properties such as uniformity, good flowability, and compressibility [26]. The choice of equipment for wet granulation includes high-shear Rapid mixer granulators (RMG) and low shear fluid bed granulators (FBG). RMG involves mixing powders with the binder in a high-shear environment. The impeller and chopper facilitate the formation of granules by applying mechanical forces. FBG involves spraying the binder solution onto the powder bed in a fluidized state. The fluidized bed aids in the uniform distribution of the binder and granule formation. Granulation Process involves the dry powders, including the active pharmaceutical ingredient (API) and excipients (e.g., fillers, disintegrants, lubricants), are blended to ensure a uniform distribution. The blended powders are loaded into the high-shear granulator’s mixing bowl. The liquid binder (e.g., water, ethanol, or polymer solution) is sprayed onto the powder bed. This binder helps in forming granules by adhering powder particles together. The impeller rotates on a horizontal plane, creating a high-shear environment that facilitates mixing and initial granule formation. The chopper, rotating either vertically or horizontally, breaks up large lumps and ensures the uniform size of granules by cutting and mixing [27]. Granulation end point determined by the granules continue to grow as the binder is added until they reach the desired size and consistency. The process is typically monitored to ensure that granules are not over granulated or under-granulated. The process is carefully controlled by adjusting parameters such as binder addition rate, impeller speed, and chopper speed. A predefined endpoint, based on granule size or moisture content, is set to determine when the granulation is complete. Scaling up a Rapid Mixer Granulator (RMG) involves translating process parameters from a smaller, laboratory-scale unit to a larger, production-scale unit while maintaining the desired granule quality and consistency (Table 3a and 3b). This process requires careful consideration of equipment design, power requirements, and process parameters. Below tabulated are the guide to some common scale-up calculations for RMG.

Table 3a: Critical process parameters, quality attributes, scale up considerations for RMG granulation unit operation.

Table 3b: Scale up considerations and industry practices for RMG granulation unit operation.

 

iii). Semi-Wet Granulation – Scale-Up Consideration and Industry Perspectives

Fluid Bed Processor (FBP) for granulation operates by passing hot air at high pressure through a distribution plate located at the bottom of the container, creating a fluidized bed of solid particles. This fluidized state, where particles are suspended in the air, facilitates drying. Granulating liquid or coating solutions are sprayed onto these fluidized particles through a spray nozzle, followed by drying with hot air. The fluidized bed processor operates on the principle of fluidization, where a gas (typically air) is passed through a bed of solid particles at a velocity sufficient to suspend the particles in the gas stream. Air is introduced through a perforated plate or distributor at the bottom of the bed, and as it flows upwards, it lifts the particles, making them behave like a fluid. During fluidization, various processes can be carried out: a binder solution or melt is sprayed onto the particles, causing them to agglomerate; hot air removes moisture from the particles; and a coating solution is applied, which is then dried. The air, now carrying moisture or coating material, exits through the top of the bed. Scaling up a FBP in the pharmaceutical industry involves several calculations and considerations to ensure that the process can be effectively transitioned from a laboratory or pilot scale to full- scale production [28,29]. The process must maintain product quality, efficiency, and compliance with regulatory standards. Here’s a detailed guide on scale-up calculations and key factors for Fluidized Bed Processors. Scaling up a FBP involves maintaining similar fluidization conditions and process outcomes as in smaller scales. Key principles include maintaining the same fluidization regime, similar granulation or coating characteristics, and ensuring that drying or granulation efficiency scales proportionally (Table 4).

Table 4: Scale up considerations and industry practices for FBP granulation.

 

C) Compression in Pharmaceutical Manufacturing

Tablet compression is a critical process in pharmaceutical manufacturing that involves transforming powdered or granulated substances into solid tablets (Figure 4).

Figure 4: Different types of compression machines used in pharmaceutical development a) Lab model Single Punch Tablet Press and b) Pilot/commercial Scale Single Rotary Tablet Press.

Compression is a critical and challenging step in tablet manufacturing. The way a powder blend is compressed directly impacts tablet hardness and friability, which are crucial for dosage form integrity and bioavailability. While the tablet press is essential for the compression process, the preparation of the powder blend is equally important to ensure it is suitable for compression. Understanding the physics and principles of the compression process is vital for managing these operations effectively. For high-dose or poorly compressible drugs, the study of compression becomes particularly important, especially when the relationship between compression force and tablet tensile strength is non-linear. A thorough grasp of compression dynamics also helps resolve many tableting issues, which often stem from various compression-related factors [30,31].

Compression Cycle

Understanding the different stages of the compression cycle is essential for comprehending how powder materials are compacted into tablets. It also provides valuable insights into the various formulation and compression variables that impact the quality of the finished tablet. Compression cycle is divided into following 4 phases: Pre-compression, Main-compression, Decompression and Ejection.

Pre-compression

As the name implies, pre-compression is the initial stage where a small force is applied to the powder bed to create partial compacts before the main compression. This is typically achieved using a pre- compression roller that is smaller than the main compression roller. However, the size of the pre-compression roller and the level of pre- compression force can vary based on the properties of the material being compressed. For instance, powders that are prone to brittle fracture may require a higher pre-compression force compared to the main compression force to achieve increased tablet hardness. In contrast, elastic powders need a gradual application of force to minimize elastic recovery and allow for stress relaxation. Optimal tablet formation is often achieved when the sizes of the main and pre- compression rollers and the forces applied are similar.

Main Compression

During the main compression phase, inter particulate bonds are formed through particle rearrangement, which is followed by particle fragmentation and/or deformation. For powders with viscoelastic properties, special attention to compression conditions is necessary, as these conditions significantly influence the material’s compression behavior and the overall tableting process.

Decompression

After the compression phase, the tablet experiences elastic recovery, which introduces various stresses. If these stresses exceed the tablet’s ability to withstand them, structural failures can occur. For instance, high rates and degrees of elastic recovery may lead to issues such as tablet capping or lamination. Brittle fractures can also occur if the tablet undergoes brittle fracture during decompression. To alleviate stress, plastic deformation, which is time-dependent, can occur. The rate of decompression also influences the potential for structural failure. Therefore, incorporating plastically deforming agents, such as PVP or MCC, is recommended to enhance the tablet’s ability to handle these stresses.

Ejection

Ejection is the final stage of the compression cycle, involving the separation of the tablet from the die wall. During this phase, friction and shear forces between the tablet and the die wall generate heat, which can lead to further bond formation. To minimize issues such as capping or laminating, lubrication is often used, as it reduces ejection forces. Powders with smaller particle sizes typically require higher ejection forces to effectively remove the tablets from the die. Industry perspective is to overall understanding the theoretical aspects of compression helps in selecting the optimal compression conditions for a given tablet product and at the same time can avoid the potential tableting problems thus saving significant time and resources.

D) Wurster Coating in Pharmaceutical Manufacturing

The Wurster fluid bed coating technique is renowned for its versatility and efficiency in coating applications [32]. This method is distinguished by its rapid heat and mass transfer capabilities and its ability to maintain temperature uniformity. Unlike traditional fluidized bed coating, which uses a more straightforward approach, the Wurster method employs a nozzle located at the bottom of a cylindrical draft tube to spray the coating solution. Particles are circulated through this tube, periodically passing through the spraying zone where they encounter fine droplets of the coating solution. This circulation not only ensures thorough mixing but also provides precise control over particle movement and coating quality. Wurster Coating Process is extensively utilized in the pharmaceutical industry for coating powders and pellets. Wurster systems can handle batch sizes ranging from 100 grams to 800 kilograms. This process is ideal for coating particles as small as 100 µm up to tablets. The Wurster coating chamber is typically slightly conical and features a cylindrical partition about half the diameter of the chamber’s bottom. At the base of the chamber, an Air Distribution Plate (ADP), also known as an orifice plate, is installed. The ADP is divided into two areas: the open region beneath the Wurster column, which allows for greater air volume and velocity, and the more restricted areas. As air flows upward through the ADP, particles move past a spray nozzle positioned centrally within the up- bed region of the ADP. This nozzle, which is a binary type, has two ports: one for the coating liquid and one for atomized air. The nozzle creates a solid cone spray pattern with a spray angle of approximately 30-50°, which defines the coating zone. The region outside the cylindrical partition is referred to as the down-bed area. The choice of ADP is based on the size and density of the material being coated. The height of the column regulates the horizontal flow rate of the substrate into the coating zone. As the coating process progresses and the mass of the material increases, the column height is adjusted to maintain the desired pellet flow rate.

Scaling up the Wurster coating process involves increasing the equipment size to handle larger batch capacities, ranging from small lab-scale units to industrial-scale machines (Figure 5).

Figure 5: Different types of Wurster coating equipments used in pharmaceutical development a) Lab model b) Pilot/Commercial scale model.

Larger systems require careful design to maintain consistent coating quality and process efficiency. Equipment dimensions, including the height and diameter of the coating chamber and the size of the Air Distribution Plate (ADP), must be scaled proportionally to ensure effective particle fluidization and coating (Table 5).

Table 5: Scale up considerations and industry practices for Wurster coating.

 

As batch size increases, maintaining optimal airflow dynamics becomes crucial. The airflow rate, velocity, and distribution must be adjusted to ensure uniform coating. Larger systems may require modifications to the ADP to accommodate increased air volume and maintain desired particle circulation and spray pattern. The configuration of spray nozzles needs to be scaled to match the increased batch size. Ensuring consistent liquid atomization and spray pattern is essential to achieve uniform coating thickness. In larger systems, multiple nozzles may be used to cover the expanded coating zone. Process parameters such as temperature, airflow, and coating solution viscosity must be carefully calibrated. Industry perspectives as scale- up introduces more variables, precise control of these parameters is necessary to maintain coating uniformity and avoid issues such as over or under coating. Scaling up involves adjustments in material handling to accommodate the larger volume and ensure smooth transfer and processing of the particles. This includes considerations for feeding systems, particle flow control, and uniform distribution within the coating chamber.

E) Film Coating in Pharmaceutical Manufacturing

Film coating is a widely used technique in pharmaceutical manufacturing to apply a thin layer of coating material onto tablets, and other dosage forms (Figure 6).

Figure 6: Different types of Film coating equipment used in pharmaceutical development a) Lab model and b) Pilot/commercial Scale film coating equipment.

This coating process enhances the appearance, improves the stability, and controls the release of active ingredients in pharmaceutical products. Different film coating formulations can be used to achieve controlled or modified-release properties. This allows for the gradual release of the drug over time, improving therapeutic outcomes and patient compliance. Film coatings can improve the appearance of dosage forms, making them more appealing to patients. Additionally, they can mask the taste of unpleasant drugs, making oral administration more acceptable [33]. Choosing the wrong film coating equipment or using subpar technology can lead to significant film coating defects. These defects can greatly affect the quality, efficacy, and appearance of pharmaceutical products. It’s essential to identify and address these issues to maintain product integrity and ensure compliance. Below is an overview of common film coating defects and their potential causes, as detailed in Table 6a. Scaling up of film coating processes in pharmaceutical manufacturing involves several important considerations to ensure that the coating process remains effective and consistent as production volumes increase Table 6b.

Table 6a: Pharmaceutical film coating defects, route cause and remedial action.

Table 6b: Scale up considerations and industry practices for Film coating.

 

Current Industry Persepctives

Current industry perspectives on scale-up calculations emphasize a comprehensive understanding of both the scientific and operational aspects of production. By leveraging the scale up calculations, advanced methodologies such as Design of Expert (DoE) and quality by design (QbD), along with a keen focus on cost, equipment selection, and regulatory compliance, pharmaceutical companies can navigate the complexities of scaling up oral solid dosage forms effectively. Adapting to technological advancements and maintaining a proactive approach to risk management will be crucial for success in an increasingly competitive landscape.

Conclusion

The scale-up of oral solid dosage forms (OSDFs) is a critical phase in pharmaceutical development that directly influences product quality, regulatory compliance, and market success. The successful scale-up of OSDFs is a multifaceted challenge that requires strategic planning and execution. By focusing on these critical factors integrated processes, quality assurance, economic considerations, regulatory compliance, technological advancements, risk management, and continuous improvement pharmaceutical industries can enhance their chances of delivering high-quality products to the market. As the industry evolves, maintaining a forward-thinking approach will be essential for navigating complexities and ensuring sustainable success in a competitive landscape.

Conflicts of Interest

The authors declare no conflict of interest

Acknowledgement

Authors acknowledge Dr. Sudhakar Vidiyala, Managing Director, Ascent Pharmaceuticals Inc. for his support and encouragement in writing this review article.

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Tobacco Smoking, the Meeting Point of Health Issuesof the 21st Century

DOI: 10.31038/CST.2024941

Abstract

Tobacco use remains a global health problem. It is the leading cause of preventable death. It causes and/or exacerbates many diseases, including cancer, COPD, cardiovascular disease, HIV infection and tuberculosis. All of these diseases are major public health challenges for the 21st century and require tobacco control efforts. Smoking cessation is an essential component in the treatment of smoking-related diseases. It improves patients’ quality of life and life expectancy, reduces respiratory decline, the risk of cardiovascular disease and HIV mortality, and contributes to the cure of tuberculosis. Healthcare professionals need to be involved in tobacco control and effective, evidence-based smoking cessation strategies.

Keywords

Smoking, Cancer, Cardiovascular, HIV infection, COPD, Tuberculosis

Introduction

In 2022, over 20% of the global population smoked. Despite a decline in smoking prevalence, it remains a major global health issue, responsible for over 8 million deaths including 1.3 million non-smokers, a year [1]. There is a clear link between tobacco use and a range of health problems, including cancer, COPD, maladies cardiovasculaires, HIV infection, tuberculosis (TB). Tobacco control is essential to address these issues.

Cancer, COPD, HIV Infection, Cardiovascular Disease, TB and Smoking

Cancer

The International Agency for Research on Cancer (IARC) [2] has recorded 20 million new cancer cases and 9.7 million cancer deaths in 2023. Smoking is a major risk factor for cancer, especially lung cancer (12.4% of all new cancer cases and 18.7% of all cancer deaths). The incidence of lung cancer is increasing worldwide and may increase by 47% between 2020 and 2040 [3].

Chronic Obstructive Pulmonary Disease (COPD)

It affects 10.3% of the global population, accounts for 4.7% of annual global mortality and has a significant economic burden. COPD is characterized by progressive, partially reversible airflow limitation caused by chronic inflammation of the airways. Smoking is the major risk factor for COPD [4].

Cardiovascular Disease

It is a leading cause of death, with nearly two million deaths annually attributed to smoking-related heart disease, including myocardial infarction, stroke, abdominal aortic aneurysm, and peripheral arterial disease. Smoking is a major risk factor for acute cardiovascular events, with smokers more at a younger age [5].

HIV Infection

39.9 million people worldwide are living with HIV; 630,000 die each year and 1.3 million are newly infected. The advent of antiretroviral therapy has reduced AIDS-related mortality, but the proportion of deaths from non-AIDS diseases has increased. Smoking is prevalent in this population; it causes cardiovascular and pulmonary (e.g. COPD, lung cancer) diseases and reduces life expectancy of life in patients [6-8].

Tuberculosis

In 2023, 7.5 million new cases of tuberculosis (TB) were diagnosed. TB was responsible for 1.3 million deaths, and 410,000 people developed multidrug-resistant or rifampin-resistant tuberculosis. Over 80% of TB cases and more than 90% of deaths occur in low- and middle-income countries. The main drivers of the TB epidemic remain the spread of HIV and the emergence of drug-resistant TB; however, tobacco use is estimated to account for 17.6% of TB cases and 15.2% of TB-related deaths in high-incidence countries [9,10]. Smoking (active or passive) increases the risk of tuberculosis infection, progression to TB disease, mortality and recurrence [11].

Stopping Smoking and Tobacco Control

Stopping Smoking: Component of Treatment for Smoking- related Diseases

Smoking is the leading cause of cancer, particularly lung cancer, but quitting improves the quality of life and life expectancy of cancer patients. It reduces the decline in lung function, the frequency of COPD exacerbations, the risk of death in patients with cardiovascular disease or HIV infection, but improves the prognosis of tuberculosis and adherence to anti-tuberculosis treatment [12]. Therefore, health professionals need to help smokers quit with evidence-based smoking cessation interventions [13,14].

Tobacco Control: Public Health Priority

The WHO Framework Convention on Tobacco Control (FCTC) [15], adopted by over 190 countries, aims to protect present and future generations from the health, social, environmental and economic consequences of tobacco consumption and exposure to tobacco smoke. It provides a framework for a global tobacco control strategy to reduce smoking prevalence and exposure to tobacco smoke.

Conclusion

Tobacco use is a major cause of many diseases with a significant impact on public health. Tobacco control has become a major public health issue that must mobilise governments and all healthcare providers.

Conflict of Interest

The authors have no conflict of interest to declare

References

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School Crossings and Police Staffing Shortages:How Generative AI Combined with Mind GenomicsThinking Can Become “Colleague,” Collaborating onthe Solution of Problems Involved in Recruiting

DOI: 10.31038/ALE.2024112

Abstract

The paper presents a four-step process for using generative AI to solve a problem, such as motivating young people to apply for a police job in a small town. Step 1 is a simulated town hall meeting to discuss the local population’s responses and issues with school safety. Step 2 is the simulated open house meeting, where AI simulates a meeting to encourage volunteering for a career in local law enforcement. Step 3 simulates four different mind- sets among potential recruits for police office and police-school officer roles. Step 4 presents a set of questions and synthesizes the four answers to each question based upon AI’s simulation of the response of each mind-set. The paper shows the power of AI to become a colleague and “knowledge worker.”

Keywords

Generative AI, Mind genomics, Police recruitment, Synthesized mind-sets

Introduction

The negative perception of law enforcement among young people is a significant factor in their decision to pursue careers in the police force. The perceived risks, challenges, and long hours can deter candidates who seek more stable and less stressful careers. This leads to fewer candidates and, in turn, to issues in meeting demands for salaries, benefits, and additional training. It should come as no surprise that the overall pool of qualified candidates may continue to shrink, making it difficult for police departments to fill vacant positions and maintain adequate staffing levels [1].

To address this issue, police chiefs should reassess recruitment strategies and identify potential barriers to attracting young people to law enforcement careers. This may involve reaching out to local schools and community organizations, offering internship programs, mentorships, and career development opportunities, and engaging young people about the benefits and opportunities of becoming a police officer [2].

To address the topic, this paper presents four strategies using generative AI as a coach and mentor. The generative AI, ChatGPT 3.5, enables the user to simulate and synthesize situations and solutions in a short time, develop insights, and then validate these insights using empirical research. As such, the paper constitutes a “vade mecum,” a guide to how one might approach this vexing problem, doing so with generative AI in a matter of 24 hours, at low cost, with the opportunity of developing critical insights about the topic along with testable suggestions.

As technology advances and automation replaces traditional jobs, the need for skilled and dedicated workers in critical roles like law enforcement becomes even more pronounced. To solve this problem, generative AI can be used to analyze and understand the underlying factors driving young people’s decisions to pursue or avoid careers in law enforcement. This data-driven approach will enable tailoring messaging, training programs, and support systems to better meet the needs and expectations of prospective candidates, ultimately increasing recruitment success.

The immediate and severe issues regarding staffing in law enforcement was brought home in an example of a town, called here TOWNX. The challenge was put forward to use a combination of generative AI and human research to address the problem. Could a system be created which could address some of the seemingly impossible-to-solve problems?

This paper presents the synthesized approach to ameliorating some of the problem, although the problem may be far from actually solvable in its entirety. Nonetheless, the structure generated here emerged with the help of generative AI (specifically ChatGPT 3.5), along with the emerging science of Mind Genomics. The paper is presented as a “work in progress,” but which can be used immediately.

The actual paper comprises four different strategies. The first two strategies deal with the reports of “meetings,” and are meant to simulate what happened, giving the reader a sense of what is going on. The second two strategies deal with mind-sets of individuals who are the likely candidates, and then questions given to these mind-sets, and how each mind-set answers the same question.

Strategy 1

The town hall meeting to discuss how the local population “came up” with answers. This strategy is based upon the book Looking Backward by author Edward Bellamy, where the forecast of what would happen in the future is written as a historical account of what had already happened.

Strategy 2

The open house meeting, where the focus was on the simulation of a meeting held to help drive volunteering to become a police officer. The vision here was to get AI to bring the reader below the surface, to discuss questions — what they really mean and how candidates might be thinking about these questions — and issues dealing with recruitment.

Strategy 3

Simulating mind-sets. The AI was told that there exist different mind-sets among the potential recruits for the police office and police-school officer roles. The AI synthesized four different possible mind-sets and provided relevant insights into the mind-sets.

Strategy 4

Creating questions about the job and then generating likely answers that each of the four simulated mind-sets would give to the same question. These are the four mind-sets used in Strategy 3. It will be the questions and answers in Strategy 3 that will be used for the empirical Mind Genomics project and reported as an accompanying paper.

Strategy 1 — A Simulated Town Meeting

A simulated town meeting with generative AI can foster creativity and innovation by providing a platform for brainstorming and idea generation. The AI can introduce new perspectives and ideas that human participants may not have considered, leading to novel solutions. Additionally, the AI can facilitate real-time collaboration and idea sharing, enabling participants to build upon each other’s thoughts and concepts. By stimulating creative thinking and encouraging out-of-the-box solutions, the simulated town meeting with generative AI can inspire innovative approaches to complex problems.

A simulated town meeting could involve a diverse group of people coming together to discuss various problems and brainstorm potential solutions. The goal is to encourage open communication, collaboration, and creativity to address complex issues facing the community. By creating a space where everyone’s opinions are heard and valued, there is the hope that innovative ideas will emerge, and practical solutions will be developed.

One potential strategy within a simulated town meeting could be to introduce generative AI that is programmed to simulate discussions about different problems and propose solutions as if they were already solved. This could help stimulate thought and generate new perspectives that human participants may not have considered on their own. The value of having AI generate solutions lies in its ability to generate ideas quickly and without bias. The AI can analyze vast amounts of data and information to offer potential solutions that may not have been considered by human participants.

However, the lack of human creativity and intuition could be a weakness of this approach. While the AI is capable of generating solutions based on existing data and knowledge, it may struggle to come up with truly innovative or groundbreaking ideas that require a high degree of creativity. Human intuition and gut instincts play a crucial role in problem-solving by guiding decision-making processes and identifying opportunities that may not be apparent through data analysis alone. By relying solely on AI-generated solutions, there is a risk of missing out on the unique insights and perspectives that human creativity can offer. Despite the potential limitations, a simulated town meeting utilizing generative AI has the potential to be a powerful tool for problem-solving. By leveraging the strengths of AI technology, such as quick data analysis and innovative idea generation, participants can benefit from a more efficient and effective problem-solving process. This approach can help foster collaboration, creativity, and diverse perspectives within the community, ultimately leading to more sustainable and impactful solutions.

Table 1 shows how the AI was prompted. Table 2 shows the summary of eight interchanges at the simulated town hall meeting.

Table 1: Prompting the AI to simulate a town hall meeting to discuss the problem.

Table 2: Part of the summarization of the town hall meeting, showing 11 different suggested topic areas, suggested by AI-created individuals assumed to have participated. The essence of the idea is shown in bold letter.

 

Strategy 2 — The Open House to Identify Ways to Encourage People to Volunteer

This second strategy focuses directly on using AI to provide interesting ideas to attract prospect candidates. Rather than solving a problem, as done in Strategy 1 above, the open house strategy focuses directly on the problem and how to solve it. Furthermore, this second strategy uses AI to simulate questions that would be given by the attendee, the importance of the question, as well as the motivating power of the answer. Even if the AI cannot really “dive” into the mind of the prospective candidate, the exercise itself provides a way to prepare oneself with a structured way to approach the necessary “back-and-forth” which can transform an audience member into a candidate. Table 3 shows the prompt given to the AI. Table 4 shows the AI results, comprising 14 questions along with the four answers to each question.

Table 3: Prompt given to the AI to simulate an open house devoted to recruiting.

Table 4: Results from the AI, showing 14 questions, and the four answers to each question provided by AI.

 

Strategy 3 — Using AI to Synthesize Mind-Sets Regarding Police Offers Specializing in School Safety

Generative AI is a powerful tool that can help companies identify the mind-sets of individuals interested in a specific job and create appealing slogans. By defining the task and asking AI to specify these mind-sets, companies can gain valuable insight into the potential target demographic for a particular job opportunity. The AI has the computational power to analyze vast amounts of data and come up with unique and innovative ideas that may not have been considered otherwise. Additionally, AI may be able to synthesize more nuanced aspects of mind-sets that are not easily quantifiable or represented in data. One potential benefit of using generative AI is that it can help companies better target their recruiting efforts by tailoring messaging to appeal to these synthesized mind-sets. The result would be more effective recruiting campaigns and ultimately result in finding the right candidates for the job. However, limitations to the effectiveness of generative AI in this context may include biases in the data used to train the AI model, which can result in inaccurate or skewed insights.

Table 5 shows the prompts given to the AI to generate mind-sets of individuals interested in a career or at least a job in school safety. Table 6 shows four mind-sets synthesized by AI for the professionalization in law enforcement and school safety.

Table 5: Prompts given to AI to generate mind-sets of individuals interested in a career or job in law enforcement and school safety.

Table 6: Four minds-sets synthesized by AI, interested in a career or least a job in law enforcement and school safety.

 

Strategy 4 — Have AI Generate Targeted Messaging Appropriate for Synthesized Mind-Sets and Then Test These Messages in Mind Genomics Studies with Target Age Respondents

Based on scientific principles of experimental psychology (psychophysics), statistics (experimental design, regression clustering), and consumer research (conjoint analysis), Mind Genomics ends up allowing the user to gain a deep and actionable understanding of human decision behavior, most important in the world of the everyday. Its rigorous, data-driven world view and methods provide a comprehensive analysis of the subject population for a topic, appropriate in our case for identifying key factors young individuals consider when choosing a career in law enforcement. By creating a unique profile of the target audience based on their responses to survey questions, Mind Genomics can reveal hidden patterns and trends in their thinking and decision-making processes. This helps a person or even a “chat bot” better connect with them on a personal level. In turn, the connection helps to create targeted messaging and recruitment campaigns which each alone and more strongly together, resonate with the specific needs and desires of young police officer recruits in Pennsylvania. The companion paper will show how Mind Genomics is used to evaluate the ideas generated in Strategy 4.

Strategy 4 provides a set of 21 questions, each with four answers, one answer from each mind-set. The objective of Strategy 4 is to show how a simple set of prompts (Table 7) end up creating a rich set of 21 questions and four answers to each question (Table 8). Table 8 was created in a matter of two iterations of Idea Coach in the BimiLeap. com platform, requiring less than a minute in total.

Table 7: The prompts used to create the questions and for each question four answers, one answer from each mind-set created and discussed in Table 6.

Table 8: The 21 questions created by AI, and for each question four suggested answers, one answer from each of the four mind-sets presented in Table 6.

Discussion and Conclusions

Generative AI has the potential to revolutionize the way individuals navigate their professional paths by providing creative and inventive solutions to common obstacles faced during the process of finding employment. By hosting town hall events or recruitment nights, individuals can openly discuss their professional goals and challenges, fostering a team effort to find solutions. Generative AI creates fresh perspectives which push the boundaries of conventional career paths, allowing the opportunity to explore unconventional ideas and find career paths that align with their passions and talents. Engaging in stimulating conversations with different AI-generated mind-sets can provide a diverse array of perspectives and valuable insights, broadening knowledge of different career possibilities and opening up new avenues for one’s future.

Generative AI also has the potential to completely transform the way we learn and create. Imagine a world where individuals can tap into the power of AI to generate new ideas, innovate, and discover their creative talents in ways they never thought possible. This technology opens up a whole new world of possibilities, inspiring people to think outside the box and pursue unconventional career paths previously deemed impossible.

Generative AI provides personalized learning experiences tailored to individual interests and preferences, sparking curiosity and igniting a passion for lifelong learning. Collaborating with AI to generate fresh ideas and explore new possibilities empowers people to unleash their creativity and think in innovative ways that were previously unimaginable.

In a future where generative AI is integrated into every aspect of our lives, it has the power to revolutionize the way we acquire knowledge, encouraging individuals to explore their creative side and venture into unconventional career paths. With generative AI as a guiding force, people can imagine new possibilities, dream bigger dreams, and pursue their passions with a newfound sense of purpose and excitement. One can only imagine what will emerge then, in terms of the practicalities of creating critical thinkers in school, and then having this critical thinking be part of the package one uses to create one’s job, and one’s future.

Acknowledgment

The authors would like to thank Vanessa Marie B. Arcenas and Isabelle Porat for their help in producing this manuscript.

Abbreviations

AI: Artificial Intelligence; ChatGPT: Chat Generative Pre-trained Transformer

References

    1. Wilson JM (2012) Articulating the dynamic police staffing challenge: An examination of Supply and Demand. Policing: An International Journal of Police Strategies & Management 35(2).
    2. Wilson JM and Miles-Johnson T (2024) The police staffing crisis: Evidence-based approaches Wilson JM (2012) Articulating the dynamic police staffing challenge: An examination of for building, balancing, and optimizing effective workforces. Policing: A Journal of Policy and Practice, 18.

Effect of Climate Change on Endocrine Disorders

DOI: 10.31038/EDMJ.2024834

Abstract

Purpose: Climate change poses a significant threat to human health, particularly affecting the endocrine system. This study aims to explore the impact of climate change on various endocrine pathways and its implications for morbidity and mortality rates.

Methods: A review of literature was conducted to investigate the relationship between climate change and the endocrine system. Relevant databases were searched for studies on the effects of temperature changes, air pollution, and vector-borne diseases on hormone levels and endocrine health. Factors influencing the degree of impact, such as climate-related stressors and individual susceptibility, were also examined.

Findings: Climate change exerts a notable influence on the endocrine system, leading to hormone imbalances and increased mortality rates. Direct and indirect effects of climate change events, including temperature changes, air pollution, and vector-borne diseases, contribute to these disruptions. Certain components of the endocrine system, such as the adrenal gland, thyroid gland, HPA axis, and reproductive organs, are particularly vulnerable to environmental changes.

Implications: Understanding the mechanisms by which climate change affects endocrine disorders is crucial for addressing this global health issue. Efforts to mitigate the impact of climate change on human health should consider the specific vulnerabilities of the endocrine system and prioritize interventions to minimize morbidity and mortality associated with endocrine-related conditions.

Keywords

Climate change, Endocrine disorders, Health implications, Endocrine-disrupting chemicals (EDCs), Environmental factors

Introduction

Climate change, primarily caused by human activities like greenhouse gas emissions from power generation, manufacturing, and deforestation, results in significant alterations in weather patterns and temperatures. This has profound implications for public health, increasing morbidity and mortality due to extreme temperature conditions [1,2]. Recent research spanning from 2000 to 2019 indicates that approximately 5 million deaths worldwide can be attributed to non-optimal temperatures, with a substantial portion occurring in East and South Asia, highlighting regional disparities in climate change impacts [3]. Furthermore, environmental factors influenced by climate change can impact the endocrine system, potentially leading to disruptions in hormonal balance and the development of disorders. This paper will explore the multifaceted impact of climate change on human health, shedding light on both direct consequences, such as mortality, and indirect consequences related to endocrine disorders. By examining these connections, the goal is to deepen our understanding of the challenges posed by climate change in the global public health landscape and contribute to discussions on mitigating its adverse effects to safeguard public health.

This literature review provides a comprehensive analysis of the effects of climate change on the endocrine system, an area that remains relatively unexplored in current knowledge. By mixing the results of different published studies, we explore new insights into how climate-related stressors such as temperature fluctuations, air pollution, and vector-borne diseases disrupt hormonal balance and contribute to increased morbidity and mortality. Our approach shows the direct and indirect pathways through which climate change produces its impacts and provides a detailed understanding of the mechanisms involved in such processes. This research not only fills a major gap in the literature but also highlights the urgent need to address endocrine health in the context of climate change.

Climate Change

Climate Change Mechanisms and Human Health

Climate change encompasses significant alterations in regional and global climate over time. These changes affect various climate parameters; average and peak temperatures, humidity, precipitation, atmospheric pressure, water salinity, and the shrinking of mountain and polar glaciers [4]. In 2020, the global average surface temperature rose by 0.94 degrees Celsius compared to the average between 1951 and 1980. Projections suggest that by 2100, this average could increase by 4 degrees Celsius above the average recorded between 1986 and 2005, significantly surpassing previous projections [5]. The primary driver of Earth’s warming is the emission of greenhouse gases resulting from human activities, particularly methane and nitrous oxide. These gases retain warmth within the lower atmosphere, leading to temperature increases which leads to both short-term and long-term threats to human health and well-being.

Extreme Events

Sub-Optimal Temperatures

Extremes in temperatures, both low and high, increase mortality rates. Deaths from suboptimal temperatures were estimated to be 9.43% of total deaths worldwide from 2000 to 2019 [6]. Being exposed to high temperatures is linked with an increased likelihood of emergency department visits and hospital admissions because of cardiovascular, respiratory, and endocrine disorders [7-9], the exact temperature thresholds for these health impacts may not be explicitly stated in the cited literature (Figure 1).

Figure 1: Annual average excess deaths due to non-optimal temperature and regional proportion for 2000-19 by continent and region.

Blauw and colleagues’ research, investigating the relationship between fluctuations in outdoor temperature and the prevalence of diabetes mellitus in the USA from 1990 to 2009, demonstrated that for every 1-degree Celsius increase in outdoor temperature, there could be an association with more than 100,000 new cases of diabetes in the country, Blauw also proposes that brown adipose tissue (BAT) metabolism correlates with temperature, where lower temperatures lead to increased fatty acid metabolism by BAT and increased insulin sensitivity, the opposite is hypothesized to be true. More data is needed to understand the direct link between the two [10]. This aligns with the interconnected nature of climate change and diabetes, knowing that individuals with diabetes are at a higher risk of dehydration and cardiovascular events during extreme heat. Evidence has also shown that high temperatures can trigger behavioural and mental disorders, leading to an increase in cases of anxiety, depression, and suicidal attempts [11,12]. Schwartz’s analysis of 160,062 deaths in Wayne County, Michigan, among individuals aged 65 or older found that patients with diabetes faced a higher risk of mortality on hot days, highlighting the vulnerability of this demographic to heat stress [13]. Associations were also observed between daily maximum temperatures and visits to the Emergency Department in Atlanta, Georgia, for cases of internal diseases including diabetes, emphasizing broader health implications related to rising temperatures[14]. An analysis of 4,474,943 general practitioner consultations in Great Britain spanning from 2012 to 2014 indicated increased odds of seeking medical consultation linked to high temperatures [15]. Furthermore, the African continent faces a heightened risk of rising temperatures, as projections suggest increasingly severe heat extremes occurring over shorter durations. Kapwata et al.’s findings suggest potential temperature increases of 4-6 degrees Celsius for the African region during the period 2071-2100, posing heightened vulnerability to heat-related illnesses, especially among young children and the elderly [16]. Overall, these findings underscore the urgent need to tackle the intricate interplay among climate change, rising temperatures, and the heightened susceptibility to diabetes and associated health complications.

Wildfires

High temperatures and low precipitation increase the risk of wildfires, which can directly lead to burns, injuries, and premature deaths [17]. Compounds released during wildfires, such as benzene and free radicals, can have far-reaching consequences on human health. In fact, the exposure to environmental pollutants from wildfires can disrupt the endocrine system, leading to imbalances in hormonal regulation. Specifically, the released compounds may impact the functioning of the digestive, hematopoietic, and reproductive systems, creating a cascade effect that elevates the susceptibility to endocrine disorders [18].

Floods and Storms

Floods, instigated by heavy rainfall and elevating sea levels, are one of the most prevalent and devastating natural disasters. They lead to injuries and drownings and exacerbate the risk of water and vector-borne diseases like dengue, malaria, yellow fever, and West Nile virus [19,20]. Diabetic patients have altered immune responses to different pathogens and are at risk of developing severe infections leading to increased morbidity and mortality.

Air Pollution

Air pollution results in decreased lung function in both children and adults, exacerbating the symptoms of asthma and chronic obstructive pulmonary disease (COPD). In addition, several studies have shown an association between air pollution and insulin resistance, leading to a heightened risk of developing diabetes (Figure 2) particulate matter smaller than 2.5 um increases the probability of developing diabetes and exacerbates the risk of diabetes-related complications [21,22].

Figure 2: Pathophysiology of air pollution and insulin resistance.

Food Insecurities

Extreme weather events may lead to decreased crop production, which can in turn lead to famines and malnutrition of populations leading to increased risk of infectious diseases [23].

Vulnerable Populations in Healthcare

Climate change may impact a particular section of a community more due to risk factors in those individuals. The vulnerable population in a community i.e. poor, elderly, disabled, children, prisoners, and substance abusers encounter heightened levels of mental and physical stress as a result of exposure to natural disasters. Reviews have shown that social factors affecting vulnerable individuals have been correlated with more or less capacity to adjust to changing environmental conditions and natural disasters [24]. In the upcoming decades, disparities may intensify, not solely due to regional variations in environmental changes such as water scarcity and soil erosion, but also due to disparities in economic status, society, human capital, and political influence [25].

Impact of Climate Change on Endocrine Disorders

Climate change exerts multifaceted effects on environmental factors, including temperature, pollution, and exposure to chemicals, which contribute to endocrine disruption. The interplay between these elements underscores the intricacy of the correlation between climate change and endocrine health. Temperature fluctuations, altered seasons, and extreme weather events induced by climate change can have significant repercussions on endocrine health [26]. Furthermore, altered seasonal patterns can disrupt circadian rhythms, affecting the production and regulation of hormones critical for various physiological processes. Extreme weather events, such as heatwaves or hurricanes, may cause stress responses in the body, potentially influencing the endocrine system and contributing to hormonal imbalances [27]. Climate-induced changes in food availability, quality, and contaminants also play a pivotal role in influencing endocrine disorders. Shifts in temperature and precipitation patterns can affect crop yields and nutritional content, impacting the availability of key nutrients essential for hormonal balance. Additionally, climate change may lead to the introduction of new contaminants into the food chain, potentially disrupting endocrine function. Pesticides, pollutants, and other environmental chemicals can mimic or interfere with hormones, contributing to the development of endocrine disorders [28].

Endocrine Disorders

Specific Endocrine Disorders and Climate Change

Thyroid Dysfunction: Research by Brent et al. (2010) reported that environmental agents influencing the thyroid may also trigger autoimmune thyroid disease, which is often the cause of functional thyroid disorders. Detecting abnormal thyroid function associated with environmental exposure is commonly attributed to direct effects of agents and toxicants triggering autoimmune thyroid problems with consideration to factors like thyroid autoantibody status, iodine intake, smoking history, family history of autoimmune thyroid disease, pregnancy, and medication use. Recognition of thyroid autoimmunity as a contributing factor to changes induced by environmental agents is crucial in these studies, illuminating the pathogenesis of autoimmune thyroid disease and exploring the possible influence of environmental factors in its development, a broad range of environmental pollutants can interfere with thyroid function; many of which have direct inhibition of thyroid hormone or induce detectable high levels of TSH consequently. Other substances such as polychlorinated biphenyls (PCBs) have a thyroid hormone agonist effect [29]. Additionally, air pollutants with levels as low as PM2.5 have been associated with hypothyroidism. There is robust evidence of increased cardiovascular morbidity and mortality associated with subclinical hypothyroidism (Figure 3) [30].

Figure 3: Overview of endocrine system.

Diabetes: Ratter-Rieck et al. (2023) reported that individuals with diabetes face heightened susceptibility to the dangers posed by elevated ambient temperatures and heatwaves due to impaired responses to heat stress. This is of particular concern as the frequency of extreme heat exposure has risen in recent decades, coinciding with the growing number of people living with diabetes, which reached 536 million in 2021 and is expected to rise to 783 million by 2045 [31]. Furthermore, evidence has linked PM concentrations to increased oxidative stress, impaired endothelial function, and it is also suggested that PM alters coagulation and inflammation cascades via epigenetic disruption [32].

A Chinese study concluded that higher PM10 levels are associated with an increase in mortality short term with a 5% overall mortality rate from diabetes with high levels of PM10 [32].

Reproductive Disorders: The “Lancet Countdown on health and climate change: code red for a healthy future report for 2021” emphasizes on the critical health risks posed by climate change [33], affecting human health through food shortages, water quality reduction, displacement, and increased disease vectors. The effects can manifest directly, such as heat stress and exposure to wildfire smoke impacting cellular processes, or indirectly, resulting in vector-borne diseases, population displacement, depression, and violence. It underscores the discrepancies in exposures among various sociodemographic groups and pregnant individuals. Vulnerable populations, including women, lower-income individuals, pregnant women, and children are disproportionately affected. The mechanisms underlying these effects involve endocrine disruption, reactive oxygen species induction, DNA damage, and disruption of normal cellular functions [33].

Regulatory Mechanisms

The endocrine system is regulated by feedback mechanisms involving the hypothalamus, pituitary gland, and target organs [34-36]. The feedback mechanism can be either positive or negative, depending on the effect of the hormone on the target organ [36]:

– A negative feedback mechanism occurs when the original effect of the stimulus is reduced by the output [36].

– A positive feedback mechanism occurs when the original effect of the stimulus is amplified by the output [35].

The hypothalamic-pituitary axis involves the production of hormones by the hypothalamus, which either stimulate or suppress the release of hormones from the pituitary gland [34]. Consequently, the pituitary gland produces hormones that stimulate or inhibit the release of hormones from other endocrine glands [34]. The target organs produce hormones that provide feedback, either positive or negative, to the hypothalamus and pituitary gland to regulate hormone production (Table 1) [34].

Table 1: EDC Drugs: Site of Action and Organ Impact.

EDC NameTarget OrganHormones Effects
PhthalatesThyroidReduced free and serum T4 Increased TSH
PerchlorateThyroidInhibited Iodine uptake Inhibited thyroid synthesis Reduced neonate cognitive function
Etomidate, Ketoconazole, Cardiac GlycosidesAdrenal GlandInhibited 11β-hydroxylase
General EDCsAdrenal GlandInhibited StAR, aromatase, hydroxysteroid dehydrogenases, Disrupted aldosterone synthesis

Common Endocrine Disorders

Diabetes Mellitus

Diabetes mellitus is a condition defined by high blood glucose levels. Type 1 diabetes mellitus results from autoimmune destruction of pancreatic β-cells whereas, type 2 diabetes mellitus is due insulin resistance. Severe hyperglycemia symptoms include excessive urination, thirst, weight loss, and blurred vision. Chronic hyperglycemia can impair growth, increase infection susceptibility, and lead to life-threatening conditions like ketoacidosis or hyperosmolar syndrome. Long-term complications of diabetes include retinopathy, nephropathy, peripheral and autonomic neuropathy, cardiovascular diseases, hypertension, and lipid metabolism abnormalities [37].

Diabetes can be diagnosed using plasma glucose criteria, which include either the fasting plasma glucose (FPG) value, the 2-hour plasma glucose (2-h PG) value during a 75-gram oral glucose tolerance test (OGTT), or A1C criteria.

Thyroid Disorders

Hyperthyroidism

Hyperthyroidism is characterized by excess thyroid hormone production. Causes include thyroid autonomy and Graves’ disease, which affects younger women and the elderly [38]. Symptoms of hyperthyroidism include heart palpitations, tiredness, hand tremors, anxiety, poor sleep, weight loss, heat sensitivity, and excessive sweating. Common physical observations include tachycardia and tremor [39]. Diagnostic measures involve assessing thyroid hormone levels: elevated free thyroxine (T4) and triiodothyronine (T3), alongside suppressed thyroid-stimulating hormone (TSH) [40]. Treatment often starts with thionamide and radioiodine therapy, the latter is preferred, especially in the US, considering pregnancy risks for women [38].

Hypothyroidism

Hypothyroidism is a thyroid hormone deficiency. It occurs more frequently in women, older individuals (>65 years), and white populations, with a higher risk in those with autoimmune diseases [41,42]. Symptoms of hypothyroidism include fatigue, cold intolerance, weight gain, constipation, voice changes, and dry skin. However, the clinical presentation varies with age, gender, and time to diagnosis. Diagnosis relies on thyroid hormone level criteria. Primary hypothyroidism is defined by elevated TSH levels and decreased free thyroxine levels, while mild or subclinical hypothyroidism, often indicating early thyroid dysfunction, is characterized by high TSH levels and normal free thyroxine levels [43]. Early thyroid hormone therapy and supportive measures can prevent progression to myxedema coma [43-45].

Polycystic Ovary Syndrome (PCOS)

PCOS is a prevalent endocrine disorder among females, affecting 5% to 15% of the population. Diagnosis requires chronic anovulation, hyperandrogenism, and polycystic ovaries with Rotterdam’s criteria incorporating two of these three features [46]. PCOS is often underdiagnosed, leading to complications like infertility, metabolic syndrome, obesity, diabetes, cardiovascular risks, depression, sleep apnea, endometrial cancer, and liver diseases. Management involves lifestyle changes, hormonal therapies, and insulin-sensitizing agents [47].

Adrenal Disorders

Cushing’s Syndrome

Cushing syndrome, also known as hypercortisolism, is a condition resulting from high cortisol levels, often due to iatrogenic corticosteroid use or herbal therapies [48]. It causes weight gain, fatigue, mood swings, hirsutism, and immune system impairment. Treatment options include tapering exogenous steroids, surgical resection, radiotherapy, medications and bilateral adrenalectomy for unresectable ACTH tumors [49].

Addison’s Disease (Primary Adrenal Insufficiency)

Addison’s disease is a rare but life-threatening adrenal insufficiency. It primarily impacts glucocorticoid and mineralocorticoid production and can manifest acutely during illnesses. It is more common in women aged 30-50 and is often linked to autoimmune conditions. There are two main types of Addison’s disease: primary adrenal insufficiency, where the adrenal glands themselves are damaged, and secondary adrenal insufficiency, where the dysfunction is due to a lack of stimulation from the pituitary gland or hypothalamus [50]. Diagnosis is challenging due to its variable presentation, and it can lead to an acute adrenal crisis with severe dehydration and shock [51].

Pheochromocytoma

Pheochromocytomas are rare, benign tumors in the adrenal medulla or paraganglia, often causing symptoms like high blood pressure, headaches, heart palpitations, and excessive sweating [52]. These tumors are often linked to genetic mutations, and it is recommended that all patients undergo genetic testing. Symptoms are caused by overproduction of catecholamines. Radiological imaging helps locate the tumor and determine its spread and elevated levels of metanephrines or normetanephrines confirm the diagnosis. Surgery is the only effective therapy while drugs are used to address hypertension, arrhythmias, and fluid retention before surgery [53].

Adrenal Hemorrhage

Adrenal hemorrhage is a rare condition involving bleeding in the adrenal glands, causing a range of symptoms from mild abdominal pain to serious cardiovascular collapse. It is caused by various factors like traumatic abdominal trauma, sepsis, blood clotting issues, blood thinner use, pregnancy, stress, antiphospholipid syndrome, and essential thrombocytosis, it can occur unilaterally or bilaterally. Rapid diagnosis requires high clinical suspicion, and diagnostic techniques involve imaging and biochemical evaluations [54].

Primary Hyperaldosteronism

Also known as Conn syndrome, is a condition causing hypertension and low potassium levels due to excessive aldosterone release from the adrenal glands. It’s a common secondary cause of hypertension, especially in resistant cases and women. Diagnosis involves aldosterone-renin ratio assessment, confirmatory tests such as saline infusion tests or captopril challenge, and imaging studies like adrenal CT or MRI scans [55]. Treatment options include aldosterone antagonists, potassium-saving diuretics, surgery, and corticosteroids [56].

Medical Impact of Endocrine Disorders

Health Consequences

Cardiovascular Complications

Uncontrolled diabetes is associated with vessel damage due to atherosclerosis, which increases the risk of heart attacks and strokes [57-59]. Hyperglycemia also contributes to inflammation, oxidative stress, and endothelial dysfunction, further promoting the development of cardiovascular complications [52-54].

Metabolic Disturbances

Conditions with hormonal imbalances, like PCOS and hypothyroidism, cause weight gain and obesity. Obesity is a major risk factor for numerous health issues, including type 2 diabetes, heart disease, and joint problems [57-59].

Autoimmune Disorders

Autoimmune disorders are common in endocrine disorders such as Hashimoto’s thyroiditis and Graves’ disease [57-61]. These conditions can increase the risk of developing other autoimmune disorders, such as rheumatoid arthritis or lupus [57-59].

Quality of Life Implications

Physical Well-being

Many endocrine disorders, such as diabetes, are associated with physical symptoms such as fatigue, pain, weakness, and discomfort [62-64].

Emotional and Psychological Well-being

Hormonal imbalances affect neurotransmitters in the brain, leading to mood disorders such as depression, anxiety, and irritability [62-65].

Social and Relationship Impact

Individuals with endocrine disorders may experience social isolation due to their symptoms or the demands of managing their condition, limiting their social interactions [62-64].

Financial Burden

Treating and managing endocrine disorders often involves ongoing medical costs, medications, doctor visits, and surgical procedures. These expenses can create a financial burden on individuals and their families, impacting their overall financial well-being [62-64].

Self-esteem and Body Image

PCOS or hypothyroidism result in weight gain and changes in appearance, which may impact self-esteem and body image. Individuals with obesity-related endocrine conditions may experience societal stigmatization and discrimination, which can lead to emotional distress and lower self-esteem [62-64].

The Intersection: Climate Change and Endocrine Disorders

Endocrine Disruption Mechanisms

Endocrine Disrupting Chemicals (EDCs)

Endocrine disruptors, are foreign substances interfering with the endocrine system’s physiologic function, leading to detrimental effects. EDCs exposure may occur through food, water, and skin exposure in adults. Fatal exposure happens through placental transmission and breastfeeding. Direct effects are seen in the exposed population and subsequent generations. EDCs are the most well-known with more than 4000 agents polluting the environment [66]. EDCs mimic endocrine action by binding to a variety of hormone receptors and may act as either agonists or antagonists. Nuclear and membrane-bound receptors are typically the two messenger systems utilized by EDCs [67]. The most commonly recognized EDCs may be agricultural, and industrial chemicals, heavy metals, drugs, and phytoestrogens [66,67]. Human exposure mostly occurs through the act of consuming these substances that accumulate in fatty tissue due to their affinity for fat. Furthermore, endocrine-disrupting chemicals interfere with the production, function, and breakdown of sex hormones affecting the growth of the fetus and reproductive abilities. These factors are associated with developmental problems, infertility, hormone-sensitive malignancies, and disruptions in energy balance. Moreover, EDCs disrupt the functioning of the hypothalamic-pituitary-thyroid and adrenal axis. However, evaluating the complete extent of ECDs influence on physical health is difficult, because of the delayed consequences, diverse onset ages, and the susceptibility of certain demographics [67] (Table 2).

Table 2: Impact of Environmental Disruptors on Endocrine Pathways by Organ.

OrganEnvironmental disruptorImpact on endocrine pathways
PituitaryPesticides, PVC.Precocious puberty. Delayed puberty. Disruption of circadian rhythm.
ThyroidXenoestrogens, Heat.Decreased iodine uptake. Thyroid hormone antagonism. Increased degradation of Thyroid hormone.
PancreasHeat, Particulate matterInsulin resistance.
AdrenalXenoestrogens, HexachlorobenzeneAdrenal biosynthetic defect.
GonadsPhthalates, Bisphenol A, Polybrominated diphenyl ethers, diethylstilbestrol, free radicals, and benzene from wildfires.Male infertility. Female infertility. Endometriosis. Reproductive tract malignancy. Polycystic ovary syndrome.  

Hormonal Imbalances

EDCs can interfere with hormonal homeostasis in different mechanisms such as affecting hormone synthesis, release, transport, metabolism, and action, mainly utilizing the structural similarity with thyroid hormones [68]. The impact of EDCs on the endocrine system is not fully understood. However, existing literature and medical research suggest an association between EDCs and endocrine disorders, with EDCs being implicated as potential causes of obesity, diabetes mellitus, and other diseases [28,69-72].

Phthalates, as a chemical commonly used in pharmaceuticals [73], have been described to have a negative association with free and total serum T4 and increased TSH levels [74] . Perchlorate, a significant EDC, mainly inhibits iodine uptake with doses as small as 5 mg/kg/day via reducing iodine uptake in the thyroid, with higher doses inhibiting thyroid synthesis [75]; its exposure risks reduced cognitive function in neonates [76] . In the adrenals, EDCs work by inhibiting or inducing enzymes, including steroid acute regulatory protein (StAR), aromatase, and hydroxysteroid dehydrogenases [77,78], involved in steroidogenesis with a minor role in aldosterone synthesis disruption [66] . Drugs like etomidate, ketoconazole, and cardiac glycosides may inhibit steroidogenesis by interfering with 11β-hydroxylase. The interference obstructs the process of converting 11-deoxycortisol into cortisol, which affects the production of glucocorticoids and mineralocorticoids (Figure 4).

Figure 4: Feedback regulation of hormone production: positive and negative.

Decreased cortisol levels impact the body’s reaction to stress and its metabolism, which may result in symptoms of adrenal insufficiency. Moreover, the interruption of aldosterone production might potentially lead to disturbances in electrolyte levels and the regulation of blood pressure. The many intricacies of this route emphasize the need of maintaining a precise hormonal equilibrium for optimal physiological functioning [66]. Furthermore, environmental toxins play a critical role in influencing reproductive health outcomes. Heavy metals and other environmental toxins can impair reproductive health in females by altering hormone function, leading to adverse reproductive health events. In males, these toxins could affect semen quality, altering sperm concentration, movement, and morphology [90,91] (Table 3).

Table 3: Climate change impact on different phases of reproductive life.

PhaseImpact FactorsDescription
PreconceptionTemperature ExtremesAffects fertility and sperm quality; heat stress can reduce conception rates.  
Air Quality  Exposure to pollutants can reduce reproductive health and increase the risk of infertility.  
Nutrition and Food Security  Poor nutrition can lead to decreased fertility; food insecurity affects overall health.  
Water Quality and Availability  Contaminated water can lead to reproductive health issues; water scarcity impacts general health.  
PregnancyTemperature Extremes  Higher risk of heat stress, preterm birth, and other complications.  
Air Quality  Poor air quality can lead to pregnancy complications such as preeclampsia and low birth weight.  
Nutrition and Food Security  Malnutrition can affect fetal development; food insecurity can lead to nutrient deficiencies.  
Water Quality and Availability  Risk of waterborne diseases affecting maternal health.  
Childbirth   Temperature Extremes  Increased risk during labor and delivery, particularly in hot climates.  
Air Quality  Respiratory issues during childbirth due to poor air quality.  
Water Quality and Availability  Clean water is essential for safe delivery; water scarcity and contamination can lead to complications.  
PostpartumNutrition and Food Security  Impact on breastfeeding and recovery; malnutrition can affect milk production and maternal health.  
Temperature Extremes  Heat stress can affect the health of both mother and infant.  
Air Quality  Poor air quality can affect respiratory health of both mother and newborn.  

Climate Change Factors Affecting Endocrine Health

Temperature Extremes and Hormonal Responses

Humans can survive in extreme environmental conditions and adapt to varying temperatures ranging from humid tropical forests to polar deserts [79,80]. Stress hormones and other stress-initiated systems have a major role in adaptive responses to environmental changes [81]. Mazzeo et al.’s study and Woods et al.’s investigation found that catecholamine and cortisol responses to physical exercise differ under conditions of hypoxia versus normoxia; with higher concentrations noted under hypoxic conditions [82,83]. The secretion of catecholamine (particularly adrenaline and noradrenaline) and cortisol during physical stress is influenced by the presence of either low oxygen levels (hypoxic) or normal oxygen levels (normoxic) in the body. When there is a lack of oxygen (hypoxia), the body responds by releasing more catecholamines, which increases the heart rate and respiratory rate. Moreover, the levels of cortisol are elevated, which promotes the mobilization of energy stores. Under typical oxygen conditions, exercise still stimulates the synthesis of catecholamines and cortisol, although the quantities may not reach the same levels as observed in low oxygen environments (hypoxia). The body’s physiological responses during physical activity are facilitated by these endocrine reactions, which are crucial for adapting to varying amounts of oxygen in the surroundings [84]. The endocannabinoids lipid mediators and N-acyl ethanolamines are closely linked to acclimation at various physiological levels, including central nervous, peripheral metabolic, and psychologic systems in response to environmental factors to achieve physiological homeostasis [85].

Environmental Toxins and Endocrine Dysfunction

Numerous epidemiological studies have indicated a link between exposure to environmental toxins and the risk of developing type 2 diabetes mellitus. Inflammation triggered by exposure to particulate matter (PM2.5) in air pollution is a prevalent mechanism that might interact with other proinflammatory factors related to diet and lifestyle, influencing susceptibility to cardiometabolic diseases [86]. Exposure to PM2.5 has been demonstrated to disrupt insulin receptor substrate (IRS) phosphorylation, leading to impaired PI3K-Akt signaling and inhibition of insulin-induced glucose transporter translocation [86] (Figure 5).

Figure 5: PM2.5 exposure impact

Foodborne toxins such as cereulide produced by Bacillus cereus might contribute to the increase in the prevalence of both type 1 and 2 diabetes through its uncoupling of oxidative phosphorylation by permeabilizing the mitochondrial membrane [87]. The production of mitochondrial ATP is crucial for generating insulin in response to glucose stimulation. Therefore, cereulide’s toxic effects on mitochondria could particularly harm beta-cell function and viability.

Altered Nutritional Patterns and Metabolic Health

Prudent diets including fruits, vegetables, whole grains, fish, and legumes have been associated with favorable effects on bone metabolism including lower serum bone resorption marker C-terminal telopeptide (CTX) in women; higher 25-hydroxyvitamin D (25OHD) and lower parathyroid hormone in men [9]. Also linked to favorable effects on glucose metabolism such as lower insulin and homeostatic model assessment insulin resistance (HOMA-IR) [9]. Consuming Western diets, characterized by the intake of soft drinks, potato chips, french fries, meats, and desserts, has been linked to adverse impacts on bone metabolism which include elevated levels of bone-specific alkaline phosphatase and reduced levels of 25OHD in women, as well as higher CTX levels in men [9]. They were also linked to higher glucose, insulin, and HOMA-IR [88].

Stress, Mental Health, and Endocrine Function

Climate-induced Stress and Hormone Levels

The primary responses to heat stress involve the activation of the hypothalamic-pituitary-adrenal axis, leading to a subsequent rise in plasma glucocorticoid levels. Epinephrine and norepinephrine are the main hormones elevated in prolonged exposure to environmental heat stress. Plasma thyroid hormones have been observed to decrease under heat stress as compared to thermoneutral conditions. Decreasing levels of thyroid hormones and plasma growth hormones have a synergistic effect in the reduction of heat production. Decreased growth hormone is necessary for survival during heat stress and Insulin-like growth factor-1 (IGF-1) has been found to be decreased during summer months [88].

Mental Health Implications for Endocrine Patients

Cortisol is a well-researched hormone in psycho-neuroendocrinology, crucial for stress-related and mental health disorders [92]. It’s assessed through serum, saliva, or urine for short-term levels, while hair cortisol can indicate long-term levels [93]. Stress triggers acute and chronic responses in cortisol release, affecting the HPA (hypothalamus-pituitary-adrenal) axis [88]. The HPT (hypothalamus-pituitary-thyroid) axis is also impacted by stress, showing transient activation and suppression with acute and chronic stressors [94]. Stress persistence is crucial in understanding stress reactions and their connection to cortisol levels and HPA axis dysfunction, which is linked to various mental disorders like major depressive disorder [95,96].

Empirical Evidence and Research Findings

Epidemiological Studies on Climate and Endocrine Disorders

Diabetes and Climate-Related Factors

Diabetes and climate change are interconnected global health challenges. Rising temperatures, heat waves, heavy rainfall, and extreme weather events are impacting diabetic patients [31,97]. These individuals exhibit heightened vulnerability to heat and climate-related stress due to impaired vasodilation and sweating responses, also diabetic patients’ susceptibility to complications will be increased [10]. Additionally, Mora et al., in their systematic review, showed that 58% of infectious agents were aggravated by climate change, posing a high risk of infections and their complications on diabetic patients with compromised immune systems [98].

Thyroid Function and Environmental Exposures

Recent research highlights the impact of environmental factors on thyroid function, assessed through TSH, FT4, and FT3 levels. Exposure to high levels of particulate matter (PM2.5) is associated with lower FT4 levels and a higher risk of hypothyroxinemia [99-101]. PM2.5, composed of fine particles carrying contaminants including heavy metals, is breathed and enters the circulation, causing disruption to thyroid function. Hypothyroxinaemia, caused by decreased levels of FT4, has a negative impact on fetal development throughout pregnancy. Exposure to PM2.5 also induces inflammation and oxidative stress, which further disrupts the control of the thyroid [102]. In adults, elevated TSH and decreased FT4 levels were associated with long-term exposure to nitric oxide and carbon monoxide [103]. Additionally, outdoor temperature was negatively linked to TSH and FT3 but positively correlated with free thyroxine and the FT4/FT3 ratio. A 10 μg/m3 increase in fine particulate matter (PM2.5) was linked to a 0.12 pmol/L decrease in FT4 and a 0.07 pmol/L increase in FT3, with a significantly negative association between PM2.5 levels and the FT4/FT3 ratio [104].

PCOS and Dietary Changes

Diet and lifestyle choices are pivotal in the development and management of PCOS. Key factors include addressing insulin resistance, considering weight and body composition, adopting a balanced diet, and the potential benefits of a low-glycemic Index (GI) diet. Tailored dietary plans aim to reduce chronic inflammation through increased antioxidant intake [105]. Additionally, research indicates a link between air pollutants, such as Q4, PM2.5, NOx, NO2, NO, and SO2, and a higher risk of PCOS, as shown by Lin et al in 2019 [106].

Case Studies in Climate-Impacted Regions

Vulnerable Populations and Healthcare Access

Climate change debates must consider demographic groups’ disproportionate healthcare access and vulnerability. Low-income communities, elderlies, children, disabled people and those with pre-existing endocrine disorders face unique climate change challenges. Climate gentrification harms vulnerable residents’ health. Environmental pollutants and endocrine disorders are more common in marginalized climate-vulnerable communities. Addressing vulnerable populations’ healthcare access disparities to reduce climate change’s endocrine and health effects is essential. Vulnerable populations in climate and health research should not be seen as homogenous due to age, health issues, geography, or time. Climate assessments should address health and inequality.

A systematic overview highlights the unique challenges faced by women in low- and middle-income countries (LMICs) due to climate change and natural disasters. The review suggests a wide range of harmful effects on female reproductive health, noting that the mean age of menarche has decreased due to climate change. Additionally, some research found a statistically significant relationship between rising global temperatures and adverse pregnancy outcomes. All of these effects are more pronounced in LMICs, which are more severely impacted by climate change [107].

Environmental Justice Considerations

Climate and endocrine diseases research must consider environmental justice which involves all socioeconomic groups in lawmaking, implementation, and enforcement. Climate-related harm is unequally distributed by population exposure, sensitivity, and adaptation [1]. Climate risks and environmental degradation disproportionately affect low-income and minority groups, who often face greater exposure to environmental hazards and have fewer resources to adapt or recover. This exacerbates health disparities and highlights the need for inclusive environmental justice policies. Additionally, there should be more consideration of vulnerable groups within these communities, who are at higher risk from climate-related events [107].

Mitigation and Adaptation Strategies

Climate Change Mitigation Efforts

There are two categories of mitigation efforts; reduction of further greenhouse gas emissions and creation of carbon sinks to decrease atmospheric greenhouse gas. The Intergovernmental Panel on Climate Change, held in March 2023, called for global action to limit worldwide temperature increase to less than 1.5 C when compared to the preindustrial period [108]. Per the World Health Organization, a global effort requires political collaborations with medical professionals, which has prompted medical representation at United Nations Framework Convention on Climate Change (UNFCCC) meetings and Conference of the Parties (COP) [109]. Local and national endocrinology groups have been promoting climate change-based policies including suggesting a climate change agenda in the 2022-2026 Environmental Protection Agency strategic guidelines in the United States of America [110].

In addition, practitioners can contribute to the fight against climate change by adopting environmentally friendly practices and promoting treatments that lead to decrease greenhouse emissions and improve health [111]. One method physicians can use is carbon accounting, where physicians measure the amount of disposable goods that have been discarded by their practice and take measures to decrease usage [112]. When ordering supplies for medical centers, physicians can consider environmentally preferable purchasing, such as focusing on reusables, which supports companies committed to mitigating the impacts of product production on climate change [113].

Personal and Community Health Measures

By recognizing the importance of lifestyle modifications for both endocrine disorders and climate change, individuals can take control of their health while actively contributing to environmental preservation. By choosing to use their muscles rather than motors, people can both lessen their release of greenhouse gases and increase their calorie expenditure. Engaging in regular physical activity stands as one of the pillars of maintaining good health; it can enhance brain health, facilitates weight management, lower the risk of various diseases, strengthens bones and muscles, and enhances the capacity to perform daily tasks [114]. Food consumption has a direct relationship with the global epidemics of Obesity and Diabetes Mellitus [115,116]. Improved dietary decisions can lead to enhanced health outcomes for both individuals and the environment. Diets rich in plant-based foods and lower in meat consumption (flexitarian diets) not only contribute to health advantages but also diminish greenhouse gas emissions originating from agriculture [117].

EDCs disrupt hormone biosynthesis, metabolism, or function, leading to deviations from normal homeostatic control or reproductive processes. There is growing evidence that these hazardous chemicals contribute to the increased prevalence of cancers, cardiovascular and respiratory diseases, allergies, neurodevelopmental and congenital defects, and endocrine disruption. The Ostrava Declaration, adopted by the Sixth Ministerial Conference on Environment and Health in 2017, encourages the substitution of such hazardous chemicals and improving information availability [118].

Policy and Advocacy in Medical Research

Government Initiatives and Regulations

Integrating Climate and Health Policies

Governmental and nongovernmental bodies around the world such as CDC, WMO, WHO, and BAMS are increasingly recognizing the link between climate change and public health. Integrating climate and health policies is essential to mitigate the adverse effects of climate change by implementing regulations to reduce air pollution, vector-borne disease control, and supporting research into climate-related health impacts [119].

Surveillance and Reporting

A study on adaptation efforts by 117 UNFCCC parties established a global baseline for adaptation trends. National Communications data unveiled 4,104 distinct initiatives. Despite advanced impact assessments and research, translating knowledge into actions remains limited. Infrastructure, technology, and innovation dominate reported adaptations. Common vulnerabilities include floods, droughts, food and water safety, rainfall, diseases, and ecosystem health. However, vulnerable sub-populations receive infrequent consideration in these initiatives [120]. Also, Greenhouse gases are one of the important factors for climate change so (MERV) guidelines which stand for minimum efficiency reporting value and consist of four guidelines which are needed for the greenhouses to accurately determine their net GHG, and other, benefits: [121].

  1. Improve data reliability for estimating GHG benefits.
  2. Enable real-time data to allow adjustments during the project.
  3. Establish consistency and transparency in reporting across various project types and contributors.
  4. Boost project credibility with stakeholders.

NGO Efforts in Medical Research

Advocacy for Environmental Health

NGOs act as catalysts in advocating for environmental health policies and practices, with a significant presence in international environmental governance. While they are recognized as essential contributors to environmental protection, there’s a lack of systematic evaluations of their roles, especially in relation to other governing bodies [122].

Promoting Evidence-Based Practices

NGOs contribute significantly to medical research by promoting evidence-based practices instead of data analysis only within healthcare systems. They work to ensure that medical interventions and treatments are based on rigorous scientific research, which ultimately leads to better patient outcomes. In addition, NGOs play a vital role in connecting scientific breakthroughs with clinical application, guaranteeing that the most recent research insights translate into tangible advantages for patients in everyday practice.

Challenges and Public Health Implications

Climate change can have a significant impact on the incidence, diagnosis, and management of endocrine disorders. For instance, exposure to extreme temperatures, air pollution, and other environmental factors can disrupt the endocrine system and lead to hormonal imbalances [123].

The public health implications of endocrine disorders are significant. These conditions can cause long-term disability, reduce the quality of life of affected individuals, and increase the risk of mortality. The burden of endocrine disorders is expected to increase in the coming years due to climate change and other factors [123].

To mitigate the effects of endocrine disorders in the context of climate change, several strategies can be employed. These include reducing exposure to environmental toxins, promoting healthy lifestyles, and investing in research to better understand the link between climate change and endocrine disorders [124]. Additionally, public health campaigns can be launched to raise awareness about the risks of endocrine disorders and the importance of early diagnosis and treatment [125].

Technology can play a crucial role in mitigating the effects of endocrine disorders in the context of climate change. For instance, digital technologies can monitor and address the increase of climate-sensitive infectious diseases, thereby safeguarding the well-being of communities worldwide [125,126]. Additionally, telemedicine can be used to provide remote care to patients with endocrine disorders, reducing the need for in-person visits and improving access to care [127]. However, the use of technology in healthcare also poses several challenges. For example, the use of electronic health records (EHRs) can lead to privacy concerns and data breaches. Additionally, the use of artificial intelligence (AI) in healthcare raises ethical concerns, such as the potential for bias and discrimination.

Future Research Directions in Medical Climate Science

Knowledge Gaps and Areas of Uncertainty

While extensive research, primarily derived from animal studies, has shed light on the potential hazards, there are critical gaps in our knowledge regarding EDCs exposure routes and threshold concentrations. Comprehensive assessments of drinking water supplies are essential to bridge these gaps. Additionally, questions persist about the long-term impacts of EDC exposure, especially during crucial developmental stages, highlighting the need for further studies to unravel these uncertainties [69].

Long-Term Health Projections

The sudden surge in metabolic disorders, reproductive abnormalities, endocrine dysfunction, and cancers raises concerns about long-term health projections. With the escalation of these diseases linked to global industrialization and the pervasive presence of EDCs in our environment, understanding the future health landscape is crucial [28]. Long-term health projections must consider the complex interplay of EDCs with human biology, emphasizing the importance of ongoing research to anticipate and mitigate potential health crises in the coming years.

Artificial Intelligence (AI) and Technological Advancements and Innovative Solutions

Machine learning models, such as the optimized Random Forest (RF) models, have emerged as powerful tools to address knowledge gaps. These models, utilizing simple descriptors and data from extensive projects, provide accurate predictions of EDC effects, enabling a better understanding of the risks associated with various substances [128]. Incorporating AI in prioritization and tiered testing workflows not only fills existing knowledge gaps but also propels us toward more efficient and precise screening processes. These advancements also facilitate the development of targeted interventions and policies, ensuring a healthier future for generations to come.

Future Perspective and Conclusion

Further research should focus on finding relationships between various endocrine disorders and different environmental factors such as climate change and environmental toxins. Extensive understanding of the causative factors will facilitate the development of medical treatments and public health policies. Embracing diverse perspectives can enhance our understanding and foster breakthroughs. To conclude, urgent action should be taken to challenge the effects of climate change on endocrine disorders; public health policies should be implemented to decrease overall exposure to endocrine disrupting chemicals by utilizing testing of various substances to reduce potential exposure in different environmental settings. Additionally, technology could be integrated into public health and preventive medicine for purposes of disease tracking and increasing accessibility to telemedicine regardless of the patient’s physical location. Although promising, other factors should be taken in consideration when technology is used such to maintain patient’s confidentiality, including privacy concerns and ethical dilemmas regarding patient data. Effective strategies demand community education, NGOs involvement, and continuous monitoring. Addressing challenges, including financial inconsistencies, requires implementing measures that promote resilience.

Declarations

Acknowledgement

The authors would like to acknowledge ACC Medical Student Member Community’s Cardiovascular Research Initiative for organizing this project.

Funding

Authors received no external funding for this project

Conflicts of Interest

Authors wish to declare no conflict of interest.

Authorship contributions

Conceptualization of Ideas: Abdulkader Mohammad, Adriana Mares, Aayushi Sood

Data Curation

Abdulkader Mohammad, Adriana Mares, Aayushi Sood

Visualization

Abdulkader Mohammad, Adriana C. Mares, Abd Alrazak Albasis, Mayassa Kiwan, Sara Subbanna

Writing of Initial Draft

Abdulkader Mohammad, Adriana C. Mares, Abd Alrazak Albasis, Mayassa Kiwan, Sara Subbanna, Jannel A. Lawrence, Shariq Ahmad Wani, Bashar Khater, Amir Abdi, Anu Priya, Christianah T. Ademuwagun MS, Kahan Mehta, Nagham Ramadan, Anubhav Sood

Review and Editing

Abdulkader Mohammad, Adriana C. Mares, Harsh Bala Gupta, Aayushi Sood

Declaration of Interest

None.

Disclosures

The authors have no conflicts of interest to disclose. 1) This paper is not under consideration elsewhere. 2) All authors have read and approved the manuscript. 3) All authors take responsibility for all aspects of the reliability and freedom from bias of the data presented and their discussed interpretation. 4) The authors have no conflict of interest to disclose

Abbreviations: 25OHD: 25-Hydroxyvitamin D; ACTH: Adrenocorticotropic Hormone; AHA: American Heart Association; AI: Artificial Intelligence; BAMS: Bulletin of the American Meteorological Society; BAT: Brown Adipose Tissue; CDC: Centres for Disease Control and Prevention; COP: Conference of the Parties; COPD: Chronic Obstructive Pulmonary Disease; CTX: C-terminal Telopeptide; EDCs: Endocrine Disrupting Chemicals; EHRs: Electronic Health Records; FPG: Fasting Plasma Glucose; FT3: Free Triiodothyronine; FT4: Free Thyroxine; HbA1c: Hemoglobin A1c; HOMA-IR: Homeostatic Model Assessment Insulin Resistance; HPA: Hypothalamic-Pituitary-Adrenal; HPT: Hypothalamic-Pituitary-Thyroid; IRS: Insulin Receptor Substrate; IGF-1: Insulin-like Growth Factor-1; LDL: Low-Density Lipoprotein; LMICs: Low- and middle-income countries; MRI: Magnetic Resonance Imaging; MERV: Minimum Efficiency Reporting Value; NO2: Nitrogen Dioxide; NOx: Nitrogen Oxides; OGTT: Oral Glucose Tolerance Test; PCOS: Polycystic Ovary Syndrome; PG: Plasma Glucose; PI3K-Akt: Phosphatidylinositol-3-kinase-Protein Kinase B; PM2.5: Particulate Matter 2.5; SO2: Sulfur Dioxide; T3: Triiodothyronine; T4: Thyroxine; TRH: Thyrotropin-Releasing Hormone; TSH: Thyroid-Stimulating Hormone; UNFCCC: United Nations Framework Convention on Climate Change; WHO: World Health Organization; WMO: World Meteorological Organization

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A Commentary on “The Criminalization of Womenwith Postpartum Psychosis: A Call for Action forJudicial Change”

DOI: 10.31038/AWHC.2024742

   

Postpartum psychosis is a unique and serious mental health challenge. Women are more vulnerable to mental illness surrounding childbirth due to genetic, hormonal and psychosocial factors. The most severe form of postpartum mental illness, postpartum psychosis affects 1 to 2 of 1,000 women or 4,000 or more women in the U.S. each year (Friedman et al.2023; Griffen 2023; Perry et al. 2021; Postpartum Support International: PSI statement on psychosis related tragedies 2004; VanderKruik et al. 2017). These mothers are at an increased risk of suicide (4 to 5 percent), and infanticide, neonaticide and filicide (1 to 4 percent). For 40 to 50 percent of those with postpartum psychosis, this is a first occurrence with no prior history of mental illness (Friedman et al. 2023; Griffen 2023; MGH Center for Women’s Mental Health: Reproductive Psychiatry Resource & Information Center 2018; Perry et al. 2021; Postpartum Support International: PSI statement on psychosis related tragedies 2004). To prevent tragic outcomes, mothers with postpartum psychosis or severe depression with psychotic features require crisis intervention, immediate hospitalization and psychiatric treatment.

The article, “The criminalization of women with postpartum psychosis: a call for action for judicial change,” published in the Archives of Women’s Mental Health, promotes postpartum criminal laws in the U.S. and abroad when criminal culpability is linked to maternal mental illness. Similarly, it is essential to include postpartum psychosis as a diagnostic criteria and classification in the Diagnostic and Statistical Manual of Mental Disorders (DSM) (American Psychiatric Association 2013; Spinelli 2021).

These changes would have enormous influence in trial and sentencing when homicide cases are a consequence of maternal mental illness.

In the U.S., the judicial system has not utilized the advancements and growing body of scientific developments regarding reproductive mental health in the last decades in psychiatry and medicine. This is evident when women with postpartum mental illness are prosecuted. In more than thirty countries worldwide, there is treatment, rehabilitation and mitigation when women commit infanticide as a consequence of psychosis and severe postpartum mental illness in the year following childbirth.

In 1938, the U.K. emphasized treatment and prevention over punishment (Infanticide Act 1938) by adopting laws safeguarding mothers suffering from postpartum depression or psychosis. Currently in the U.K and many other countries, a woman who causes the death of her child within 12 months of delivery is presumed to be mentally ill.

In the U.S., Illinois is the only state that considers maternal mental health as a factor in cases of infanticide. Public Act 100–0574 signed into law in January 2018 and amended in 2019 by PA 101– 411, recognizes postpartum depression and postpartum psychosis as mitigating factors to be considered in trial and sentencing. This law allows women who are currently incarcerated to file for resentencing and allows consideration of postpartum mental illness in past, present and future cases.

It is essential to prioritize awareness and prevention of postpartum mental illness to save the lives of mothers and babies. We must enact comprehensive postpartum laws in every state to address screening and treatment as well as to consider mental health as a mitigating factor when unrecognized and untreated mental illness leads to tragedy and involvement with the criminal justice system. The time is NOW to enact postpartum criminal laws and judicial change throughout the U.S. and abroad.

Building Research Collaboration Across University Departments: A Swot Analysis

DOI: 10.31038/IJNM.2024544

Abstract

Purpose: To challenge the collaborative process in a young research team with evidence on building research collaboration in university departments.

Methods: A structured literature review was combined with a hermeneutic analysis of data from a double survey conducted during a one-week seminar. Eight Norwegian participants provided data through a Strengths, Weaknesses, Opportunities, and Threats (SWOT) template.

Results: The literature review revealed two themes 1) Building a research network, and 2) Networking across university units. A naïve reading of the double survey data showed that participants enjoyed collaborating in research networks. A structured interpretation provided a contextual report on collaborative research processes across university units working to build research collaboration.

Conclusion: Excellent research collaboration emerges through focus, flexibility, trust, persistence, and leadership. A successful research group is dependent on positive engagement between members, the acknowledgment of individual contributions and ideas; and supportive team leadership which is especially facilitated through dialogical leadership.

Keywords

Hermeneutic analysis, Literature review, Leadership, Competence development, Qualitative, SWOT

Introduction

Research collaboration refers to “the working together of researchers to achieve the common goal of producing new scientific knowledge” [1]. In this context, occupational professionals who work in research and development are strategically managed [2] to improve knowledge transfers through transformational leadership [3]. This process is critical, as research collaboration is fundamental to scholarly research success. However, it is often difficult to build a collaborative research team [4]. To clarify the characteristics of such an endeavor, this study reviewed the literature on building collaborative research teams, then compared the results using a collaborative process experienced by a young, publicly funded healthcare research team that spanned multiple university units.

Background

Our initial literature review yielded 443 articles, of which we retained 394 after removing duplicates (Figure 1). Two of the authors then conducted independent screenings, resulting in 23 for potential inclusion. After reviewing the full texts of each, the authors excluded 15 for focusing on collaboration between international teams or separate universities rather than intradepartmental collaboration. Thus, the final sample contained eight articles, with various settings in the United States, Canada, Greece, the United Kingdom, and Ireland. One article introduced a new method for developing strategic research plans [5], while another investigated several issues at a specific research center, including collaboration, multidisciplinary approaches, support, and dissemination [6]. The remaining six articles primarily discussed the experiences of their respective authors and offered relevant reflections [7-12]. No article in our final sample provided a substantial literature review on the process of building a collaborative research team across different units within the same university department. Based on the evidence from these articles, we identified two main themes, including 1) Building a research network and 2) Networking across university units. An additional literature review conducted by two of the authors, in July 2023, did not result in new publications being included, so this topic does not appear to have had recent international research focus.

Figure 1: Flowchart of the literature review process

Building a Research Network

Organizational factors are essential for building research collaboration. To achieve success, three such factors are particularly important: leadership [5-7,9,12], mentorship [5-7,9,12] and cultural background [12]. In this regard, team leaders should promote team learning, serve as role models, support a favorable climate for cooperation, explain rational decisions, and help team members attain self-efficacy [9]. Thus, skilled team leadership and support are critical provisions for a thriving collaborative research team [6]. In a specific example, Best et al. [5] found that the research community was more likely to remain engaged and informed when the team leader frequently sent informative and humorous emails. A collaborative research team provides a platform of interaction for junior and senior researchers, thus facilitating training and mentorship. In the university context, team membership also helps individual researchers avoid isolation, while providing them with more opportunities to complete their own research [6]. According to Davis et al. [12], various challenges may arise when attempting to build a university-based collaborative research team, especially given the existence of different cultural backgrounds, heterogenous responsibilities, various academic practices, cultural factors, and politics. To establish an excellent, research-intensive environment, teams should help all members discuss their methods and struggles in ways that can unite them toward common goals [6].

Networking Across University Units

A researcher’s ability to network across university units depends on their individual values [7-8,10,12], the time available for research [5-7,12] and computer technology [7]. Meanwhile, an excellent collaborative research team requires focus, flexibility, trust, persistence, and leadership, which are developed through combined personal interests and common purposes. Thus, team success requires mutual respect for individual ideas and contributions as well as transparency during each step of the process [7]. Regarding issues faced by individual researchers, four articles mentioned the challenge of finding time to contribute to research teams [5-7,12], while another noted the constraints associated with simultaneous involvement in several international projects [7]. Under such conditions, it is crucial for both the whole group and individual team members to accept varying degrees of participation at different stages [9]. Based on their experiences in the healthcare field, Best et al. [5] explained how successful research collaboration could increase individual involvement in team aims while facilitating knowledge transfers to students and patients. Three articles emphasized that computer technology is essential for maintaining cooperation across university departments [6-7,9]. In one study, Steinke et al. [7] pointed out that personal computer skills are likely to vary among team members, which may create difficulty. Moreover, the strength and quality of the internet connection may pose challenges in cases where team members need to travel or communicate from different time zones during meetings [7]. Overall, these reports suggest that managers must remain aware of how research collaboration is influenced by personal values, contextual management, mentorship, and the time needed to conduct research. At the same time, the interpersonal elements of the research process depend on mutual trust, focus, and flexibility. In addition to the literature review, we conducted a qualitative study [13] based on a double Strengths, Weaknesses, Opportunities, and Threats (SWOT) analysis. Specifically, the SWOT analysis employed a modified standard tool among Norwegian members of a university research team to identify key factors that influenced group performance; these factors were further examined to enhance strengths, optimize opportunities, improve weaknesses, and attenuate threats [14].

Method

Literature Search

We initially gathered evidence on collaborative research team building by searching databases with the assistance of a university librarian, including CINAHL, Medline in PubMed, and PsycInfo. We created search terms using different combinations of the following words: scholarly activities, research, nursing/nursing research, national relation/national cooperation, teamwork, cooperative behavior, and collaboration. For returned articles, we set the following inclusion criteria: peer-reviewed studies with abstracts/full-text articles from 2010 to 2020. These were searched using the Boolean/ phrase technique. We repeated the initial literature search in July 2023 for the time period 2020-2023 and added no new articles to our analysis and findings.

Participants in SWOT Analysis

The SWOT participants included eight members of a university research team established in 2017. Specifically, the team was comprised of four scholars, two lecturers, and two Ph.D. students, with an age range of 35 to 65 years.

Data Collection

We distributed the SWOT template on the first day of a weekly winter summit in 2019, with responses collected shortly after (100% response rate). As the survey took approximately 40 minutes to complete, it is assumed that participants gave their answers spontaneously. We repeated the data collection process on the last day; that is, after the program had ended, but before the evaluation session. Before the distribution of the SWOT template, the participants were informed about the study’s aim, the anonymity of their contribution, and their right to withdraw their written consent anytime. Each participant signed an informed consent form before data collection started. No participant withdrew their participation. In this paper, we have ensured their anonymity by using numerical designations when quoting any statements.

Data Analysis

We analyzed and interpreted the responses from participants with reference to Ricœur’s [13] theory of interpretation. This consisted of a three-level process: a naïve reading, followed by a structural analysis, and concluding with a comprehensive discussion. All authors read and reread the data from the SWOT templates [13], thus identifying a naïve understanding. In the structural analysis, we gathered sections of text (consisting of text portions across the SWOT templates) into larger units of meaning [15]. Finally, we comprehensively discussed the meaning of the text in reference to the selected theory and outcome of the initial literature search.

Results

Naïve Reading

The naïve reading indicated that the participants were responsible, cheerful, and helpful. In general, they enjoyed research collaboration. However, some participants found teamwork burdensome when certain members did not fulfill their obligations. They described new technology as exciting, noting that it streamlined their work. At the same time, good leadership was mentioned as inspiring, while the lack of leadership negatively influenced their ability to work effectively with colleagues. Participants also reported that the process of applying for research funding required too much time when compared to the research outcome, and also affected their ability to attend conferences and meet with the research team.

Structural Analysis

Our structural analysis focused on 311 statements taken from the two surveys (161 and 159 from the first and second rounds, respectively). In both surveys, dominant strengths emerged from statements the participants made about their individual characteristics (35 of 58 and 36 of 50 from the first and second rounds, respectively). On the other hand, weaknesses also emerged. For example, some participants emphasized the challenges of navigating additional tasks (19 of 42 statements from the first round), while others mentioned insufficient knowledge about methodology and scientific factors (14 of 34 statements from the second round). In both rounds, participants highlighted a major opportunity derived from the benefits of being part of a research group (15 of 28 and 19 of 32 from the first and second rounds, respectively). They also identified some threats, including those pertaining to the relationship between their aims and obligations (20 of 33 statements from the first round) and challenges between individuals and their participation in the research team (18 of 34 statements from the second round). Ultimately, we summarized the structural analysis into two themes, including 1) strengths, weaknesses, and threats to building research collaboration and 2) collaborative processes across university units. To keep track of individual statements, we assigned a unique number to each participant (i.e., numbers 1 through 8). Thus, all statements and quotations in the two following subsections are connected to the numbers of relevant participants; to further distinguish between the two rounds of SWOT template completion, we also attached the letter “b” in cases where those statements and quotations were from the second round.

Strengths, Weaknesses, and Threats to Building Research Collaboration

Frequently noted strengths included the ability to work effectively under time pressure (3, 5, 8, 4b, 5b, 6b, 8b) and adopt personal responsibility (2, 4, 7, 8, 2b, 3b, 6b, 8b). One participant stated: “Accountability is an integral part of me as a person” (2). Meanwhile, relevant qualities included courage (2), determination (6, 8, 5b, 8b), curiosity (3, 7, 6b), and commitment (2, 4, 7, 8, 2b, 3b, 4b, 6b). Another strength was the ability to both cope with deadlines and respect the deadlines of others (1, 6, 7). In both surveys, half of the participants said that too many tight deadlines could lead to issues such as pressure (1, 2, 7, 8, 8b) and sleep deprivation (1). Consequently, time pressure was considered a threat to their research activities (1, 1b, 2b, 4, 5, 8, 8b). Some participants wanted their work to be more systematic (2, 7b). For example, one said: “I’m not delivering well under strong pressure; then, I’ll be a little paralyzed” (6b). Only one participant said that she had become better at prioritizing over time (5b). Possessing competence in a specific research method was also considered a strength. In this regard, two participants said that they had extensive research competence (3b, 7b). At the beginning of the seminar, only two participants said that they lacked broad research experience (3, 8); however, four participants mentioned relevant personal weaknesses at the end of the seminar, in terms of either general research competence (3b, 6b, 8b) or a specific lack of expertise linked to quantitative methods (8b) or scientific theories (5b, 8b). Of note, half of the participants identified weaknesses in their own contributions to the research team (4, 5, 6, 8). Some also identified insufficient knowledge about methodology and a lack of fluency in speaking (1) or writing academic English (4, 5, 6, 8). One participant said: “I don’t feel that academic writing comes easy for me” (4). Three participants perceived opportunities regarding new technology, explaining that such provisions could facilitate research collaboration (2, 3, 6, 6b). While one participant said that new technology could enable more efficient work (6b), only one said that technology was an integral part of their field (2).

Collaborative Process Across University Units

As a theme, the collaborative process was focused on interpersonal relationships between participants. For example, they said that they enjoyed collaborating with others (3, 4, 2b, 4b, 8b), and had become more open-minded about each other’s perspectives through teamwork (5). They also perceived themselves as honest (7), loyal (2), and good at listening (5). One participant said that her personal weaknesses were speaking more than listening and losing patience with pessimists (7). Moreover, specific collaboration skills (4, 8, 2b, 6b, 7b, 8b) were considered essential for the development of positive collaborative processes and research networks, particularly including openness to ideas presented by other team members (1, 2, 4, 5b). When describing elements they believed were central to team collaboration, the participants used words and phrases such as encouragement (8), support for progress (8), and the ability to motivate others (6b). Openness to ideas proposed by other people was also a factor that contributed to new perspectives (7b). The participants identified multiple benefits of building research collaboration (1b, 3) and sharing experiences (1b). By jointly collecting data and writing articles, team members developed relationships that helped them enhance their research and produce high-quality publications (8, 8b). They considered research collaboration with both internal and external research partners to be desirable (2b, 8, 7b), noting its contribution to professional development (2, 7b). Other participants said that they received more advice from experienced researchers by building relationships in the research group (3b, 4, 5b), which became an arena for inspiration and support (4b).

Through these relationships, the participants gained access to a “room” where they could be open about their shortcomings and needs (7). There were also threats to building effective collaborative processes, including instances in which others dominated the group (2, 7, 1b, 2b, 4b, 6b, 8b), late (or no) responses from research group members (4, 6, 4b, 7b), the lack of ambition among participants (7, 8), and the absence of mutual trust or respect (5, 4b). Six of the eight participants said that the lack of participation from others was a possible weakness in the collaborative group process (1b, 2b, 3, 3b, 6, 6b, 7, 7b, 8b). For example, one said: “The worst thing when working in a team is when someone says they are going to do something, but they do not do it, or does it badly” (3). Five of the eight participants said that effective team management played a major role in building good collaborative relationships (2, 3, 5, 6, 7, 2b, 8b). As a point of emphasis, leadership was said to motivate and inspire relationships between group members (3, 7). By contrast, individual participants felt discounted when they believed that their leaders did not listen to them (2b, 8b). The ability to establish and maintain local, national, and international networks (7) was considered necessary for group collaboration. Other essential aspects were efforts to include (4) and connect people (2), guide and teach students (7), and teach others how to perform. For example, a phenomenological analysis was mentioned (1). One participant said that it was essential to become involved in research conducted by other members (7b).

Discussion

This study critically reviewed the recent literature on building research collaboration, then compared this evidence with the collaborative process experienced by a publicly funded healthcare research team that spanned multiple university units, as collected via a SWOT analysis. The literature review revealed two main themes:

  1. building a research network and 2) networking across university units. The structured SWOT analysis also identified two themes:
  2. strengths and threats in building research collaboration and
  3. collaborative processes across university units (Table 1). In the following subsections, we incorporate a theoretical perspective to provide a comprehensive discussion that is relevant to our study aim.

Table 1: Themes identified from the literature review and local SWOT analysis

ThemeFrom: Literature reviewFrom: Local SWOT analysis
1Building research networkStrengths and threats to building research teamwork
2Networking across university unitsCollaborative processes across university units
 

Building Research Networks

Evidence from the eight reviewed articles indicated that organizational factors could form barriers to research collaboration in the context of publicly funded specialized healthcare research teams. The SWOT participants mentioned similar issues. For example, their faculty leadership did not understand that tight time schedules influenced their ability to conduct research. As a specific hindrance, time pressure threatened their research activities because it reduced opportunities for sleep. In a previous study, Maslach and Leiter [16] found that burnout was more likely to occur when organizational demands exceeded individual capacities. Although work management abilities vary between researchers, they are still affected by relationships between the researcher, group leader, and faculty leadership [17]. Here, leadership styles matter. Autocratic leaders simply dictate group activities and work tasks [18], thus deciding how much group members should contribute without asking for their input [18]. This diminishes agency within the team, which can be solved through a more democratic leadership style that allows collaborative decision-making [18]. Our data analysis also showed that autocratic management styles could threaten research collaboration, especially when leaders demanded rapid solutions, as this further tightened the time schedule. In the literature review, four articles reported that insufficient financial support was a potential barrier [5,7,9,10]. The same problem was mentioned by three of the SWOT participants. Without funding, it can be much more difficult for researchers to test their ideas [19]. This also creates publication hardship. For example, Malhotra [20] found that most academicians in India faced considerable expenses when attempting to gain journal publication, especially in periodicals with high impact factors. However, our SWOT participants did not mention this barrier, perhaps because public universities in Norway offer publication funding.

Networking Across University Units

The SWOT analysis revealed that personal values, transformational leadership, mentorship, and access to financial resources could influence research network collaboration across university units. Interpersonal elements of the research process were also important, including mutual trust, consistent focus, flexibility, and the ability to find time for group collaboration. Previous research has also shown that collaboration groups can more easily work toward common goals when they are situated in excellent research-intensive environments (6). However, the ability to work effectively under time pressure varied considerably among our SWOT participants. Some expressed feelings of stress when navigating multiple tight deadlines, while others reported improved prioritization ability with increased experience. Mentorship can prevent burnout by helping inexperienced researchers learn how to balance different work tasks [6] and develop new skills [21]. This makes provision of mentorship especially important for young academicians. For nursing scholars, mentorship can encourage positive relational, attitudinal, behavioral, career, and motivational changes [22]. Our SWOT participants mentioned some additional barriers to research collaboration, including limited research experience and difficulties with academic English.

Of note was that four participants emphasized that their weaknesses in both research experience and academic English skills hampered their contributions to the research group, neither of which factors clearly emerged through our literature review. Nevertheless, Dorsey et al. [9] and Cohen et al. [6] said that collaborative group leaders and experienced researchers should jointly serve as role models. Functioning in such a capacity entails facilitating interactions with junior researchers, who can therefore benefit from better training and mentorship for life in academia. Differences in computer skills and internet access can affect availability, thus impacting the degree to which team members can collaborate [7]. As such, researchers should develop and employ technology to improve communication between team members who are geographically distant (Dorsey et al.[9]; Cohen et al. [6]. Moreover, collaborative groups can contact their university’s information/computer technology departments to ensure that necessary computer and web technologies are available [9]. Finally, Steinke et al. [7] recommended a backup plan if videoconferencing fails, including email correspondence or other free internet software applications. In the modern technological environment, numerous tools support collaboration and the development of professional skills in the university setting [23]. In fact, none of our SWOT participants mentioned computer technology as a barrier to the research process or group collaboration, suggesting that they worked in a technology- rich environment. At the same time, personal computers have become increasingly common in research environments.

Motivation is also essential for international collaboration [24]. In this regard, Bass et al. [25] argued that inspirational leadership with a motivational focus on personal behavior could provide meaning while challenging team members to efficiently achieve future goals. According to Anselmann and Mulder [26], transformational leadership can further help leaders identify potential areas of change and encourage necessary adjustments. However, an open-minded view of other perspectives can be interpreted as a wish to view collaborating partners as equals, which may be challenging when team members possess different skills and experiences [27]. According to our findings, mentorship can reduce problems related to time pressure and the lack of academic skills. This is greatly beneficial for inexperienced researchers, who can realize personal development, increased research productivity, and better career opportunities [28]. As a practical example, our SWOT participants expressed the desire to develop skills in writing applications under the guidance of senior members. Based on our experiences in this study, we envision opportunities for research group leaders to employ SWOT templates. Such an approach will clarify team strengths and weaknesses, which can help them customize their mentorship accordingly.

Study Strengths and Limitations

As regards strengths, this study conducted a preliminary comprehensive literature review, which became a benchmark when discussing our analysis and findings. However, there were also some limitations. First, the participants were exclusively invited to participate in the research seminar, and may have therefore been more positive and open toward both their own development and SWOT factors in general. However, the group was also comprised of novice and expert researchers, who addressed a situation that similar research teams may experience, which constitutes a strength. Second, the participants were required to complete the SWOT template within a limited time, which may have elicited superficial answers to the four explored areas. However, they were also able to build on their initial answers during the second survey round, which thus constitutes a strength in data collection, as evident in the enhanced development of their responses.

Conclusion

This study found that supportive leadership and active mentorship between experienced and inexperienced team members could facilitate the research process and increase collaboration in the context of a publicly funded specialized healthcare research team. Of note, supportive leadership is highly essential. Our SWOT participants said that their ability to motivate and support other team members depended on whether the team leader offered the same provisions. Our perception is that supportive and motivated team leaders can serve as positive role models for the entire team, thus creating a group culture that prevents non-participation or late responses from members. In most scientific endeavors, the establishment and maintenance of a collaborative research team are fundamental to success.

Implications for Nursing

  • Supportive leadership is highly essential for nurse researchers to flourish.
  • Nurse managers may not have research experience or necessary insight into the working conditions that support research collaboration
  • It is important to adopt a transformational leadership style in which a dialogical practice can support specialized healthcare research teams in their positions.

Conflicting Interest

None.

Disclosure

The authors report no conflicts of interest in this work.

Funding

We thank Nord University for funding a Winter Summit in 2019 and providing a grant for Mrs. Hansen to act as a research assistant for professor Uhrenfeldt in 2019-20.

Ethical Approval

No ethical approval was required for this research. The study is registered at Nord University (FSH by j.no 24.04.20).

Author Contributions

Study design: LU. Data collection (Literature search); quality appraisal and data analysis: MCH, LU, KI. Data collection (SWOT analysis): MCH supervised by LU. Manuscript preparation MCH, supervision, and critical review by LU, KI. All authors critically reviewed and approved the final manuscript.

Language Editing

This paper is edited by The Golden Pen.

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Perception and Attitude of the General Population of Zanjan, Iran in Comparison to Medical Students Toward Schizophrenia

DOI: 10.31038/IJNM.2024543

Abstract

Background: The perception and attitude of the general population and health-care workers towards psychiatric disorders have a direct effect on the outcome of these diseases. Negative perceptions and attitudes can lead to worse social facilities (such as employment, and housing), lower self-esteem, help-seeking behavior, as well as complications in receiving health care. Little information is available about the perception and attitude towards schizophrenia in Iran.

Methods: This study was conducted to evaluate the perception and attitude of the general population and medical students toward schizophrenia in Zanjan province, Iran. Several possible factors affecting perception and attitude were also evaluated. A descriptive-analytical cross-sectional study was conducted on 788 medical students and the general population of Zanjan province. A researcher-made questionnaire was used to collect data.

Results: The scores of perception and attitude toward schizophrenia were compared between the two populations. In the comparison of the two general and medical populations, only a significant relationship was found between the attitude of ineffectiveness (significance = 0.001) and stigmatization attitude (significance=0.001), which means that the attitude of the general population is more negative than the medical population.

Conclusion: No correlation was found between gender and level of education with attitude and perception towards schizophrenia. A statistically significant relationship was found between family history and negative attitude towards schizophrenia. A significant relationship was also found between taking a psychology or psychiatry course with a more positive attitude and perception towards schizophrenia.

Keywords

Schizophrenia, Perception, Attitude, Iran

Introduction

Schizophrenia is a mental illness with features such as delusions, hallucinations, disturbed behavior, and negative symptoms that impairs social and occupational functioning and is quite debilitating [1]. According to the World Health Organization’s definition, schizophrenia is a severe disorder that usually begins in late adolescence and early adulthood [2]. A key feature is disordered thinking and perception, often accompanied by inappropriate emotions. The lifetime prevalence of schizophrenia in the United States is around one percent [3]. The prevalence of psychosis especially schizophrenia in Iran is the same as in other countries and is estimated to be around one percent of the general population [4]. Perception and attitude have different definitions in various fields of psychiatry, psychology, and sociology. Social perception refers to how a person is seen by society or other people [5]. Attitude is a state of mental readiness that is acquired through experience and has a direct and dynamic impact on an individual’s response to all attitude-related issues and situations [6]. Perceptions and attitudes toward mental disorders may be positive or negative. Social stigma refers to the negative beliefs and attitudes of the general population towards individuals with mental disorders [7]. A common belief is that people with schizophrenia are unpredictable, dangerous, aggressive, and inadequate. Therefore, many people may have a strong tendency to maintain social distance from these people [8]. Social stigma, apart from the mental illness itself, has serious negative consequences for individuals with mental disorders. It can lead to damaged social facilities (such as employment and housing), lower self-esteem, help-seeking behavior, ruined friendships, and familial relationships, as well as complications in receiving health care. Mental illness stigma can also lead to delays in receiving treatment [9]. In Iran, research has been conducted on stigma towards mental disorders. The global nature of stigma, lack of awareness among mental health professionals and other experts, cultural barriers, policy-making structures, and lack of financial resources are all obstacles to improving stigma [10]. In studies conducted within Iran, even medical students who undergo clinical training may have negative attitudes toward mental disorders [11]. There is limited information about the perception and attitude toward schizophrenia in Iran. Therefore, this study was conducted to evaluate the perception and attitude of residents of Zanjan province and medical students in this province towards schizophrenia.

Methods

Study Type and Population

This study is a descriptive-analytical cross-sectional study conducted in 2023-2024 on two groups of medical students and the general population of Zanjan province. All medical students who were studying at Zanjan University of Medical Sciences in 2023 were used as the source population for the “medical” group. Patients referred to Ayatollah Mousavi Hospital’s clinics were also used as the source population for the “general population” group. The inclusion criteria for the study were medical students at Zanjan University of Medical Sciences or visitors to the Ayatollah Mousavi clinic in Zanjan in 2023 who were able to read and write, willingness to participate in the study, ages between 18 and 70 years old, and negative history of psychiatric illness. The exclusion criteria were illiteracy, unwillingness to participate in the study, ages over 70 or under 18 years old, and a positive history of psychiatric illness in the participant.

Sample Size

Based on similar studies, the G*power software was used to estimate sample size by comparing the means of two independent groups. Since the means of the two groups were estimated to be close to each other, a smaller effect size (0.2) was chosen to obtain a larger sample size. A type alpha error probability of 0.05 was considered. The sample size for the “medical” group was estimated to be 394. The sample size for the “general population” group was also estimated to be 394 and convenience sampling was used to select the general population from visitors of the clinics.

Data Collection Tool, Validity, and Reliability of the Questionnaire

A researcher-made questionnaire was used to evaluate the attitude and perception towards schizophrenia. This questionnaire consisted of 23 questions that were extracted from similar studies [12-30]. The questions were adjusted based on Iranian culture and social conditions. For example, in studies conducted in African countries, factors such as witchcraft, evil eye, and god’s will were identified as causes of schizophrenia [14], but such cases were not included in the researcher-made questionnaire. Instead, factors such as stress, physical and chemical brain disorders, poverty, etc., which are more compatible with the cultural conditions of Iran, were included as possible etiologies of schizophrenia [21]. A three-point Likert scale (1-3) was used to score the questions in the questionnaire. A score of 1=agree, 2=not sure, and 3=disagree was considered, with a lower score indicating a more positive attitude and perception. Demographic factors such as gender, age, and education level were also asked of the participants. A family history of psychiatric disorders was also asked of the participants. Participants were also required to indicate if they had completed a psychology or psychiatry course before. The content validity of the questionnaire was evaluated by psychiatry and Persian literature professors, and corrections were made before sampling. Cronbach’s alpha test was used to assess the reliability of the questionnaire. The internal consistency analysis of the 23-item schizophrenia scale yielded a Cronbach’s alpha of 0.55, which increased to 0.68 after removing items 7-8-9-10-15-16-20-22.

A psychiatrist developed case vignette was used to help the general population what was meant by schizophrenic people.

Variables

The dependent variables include perception and attitude toward schizophrenia. Independent variables include demographic characteristics, family history of psychiatric disorders, and completion of a psychology or psychiatry course.

Data Analysis Method

Incomplete questionnaires were excluded from the study. The data were entered into SPSS version 26 software. The frequency distribution of demographic variables was examined. The frequency distribution of responses to schizophrenia questionnaire items was also examined individually. The reliability of the questionnaire was evaluated using Cronbach’s alpha, which reached 0.68 after removing some items. The remaining items were subjected to exploratory factor analysis with varimax rotation. These items were divided into four factors: perception of the etiology of schizophrenia, attitude toward the inefficacy of schizophrenia, attitude toward the stigmatization of schizophrenia, and attitude toward the destigmatization of schizophrenia. Perception and attitude scores regarding schizophrenia were compared between the two general and medical populations using the t-test. The relationship between completion of a psychology or psychiatry course, family history of psychiatric disorders, gender, education level, and age with perceptions and attitudes toward schizophrenia was also examined using an independent t-test. Finally, independent variables with a significance level less than 0.05 were considered statistically significant.

Results

Demographic Characteristics

A total of 394 medical students and 394 individuals from the general population were included in the study. 99.2% of the medical students were between the ages of 18 and 30 and the number of medical students over the age of 41 was zero. 57.9% of the general population were between the ages of 18 and 30. 43.4% of the participants in the medical group were male and 56.6% were female. In the general group, 53% were male and 47% were female. Almost half the general population has a university education and half does not (Table 1).

Table 1: Socio-Demographic Characteristics of Respondents

Variable

  Frequency

Percentage (%)

Age groups  

18-30 y/o

31-40 y/o

41-50 y/o

51-60 y/o

61-70 y/o

General population

228

80

47

31

8

Medical population

391

3

0

0

0

General population

57.9%

20.3%

11.9%

7.9%

2%

Medical population

99.2%

0.8%

Gender Male

Female

209

185

171

223

53%

47%

43.4%

56.6%

Educational level Non-university Graduates

University Graduates

Medical students

199

195

394

50.5%

49.5%

 

50%

Factor Analysis

Internal consistency of the 23-item schizophrenia scale through Cronbach’s alpha yielded a value of 0.55, which increased to 0.68 after removing items 7-8-9-10-15-16-20-22. The remaining 15 items were subjected to factor analysis with varimax rotation.

Factor one, which makes up 25.69% of the variance includes six questions that are all about the etiology of schizophrenia. This factor was named perception of the etiology of schizophrenia.

Factor two, which makes up 17.74% of the variance includes three questions that are all about the capacity of an individual in their personal and work relationships. This factor was named the attitude of the inefficacy of schizophrenia. Factor three, which makes up 11.01% of the variance includes two questions that are both about destigmatization. This factor was named the attitude of destigmatization of schizophrenia. The scores for this factor were reversed meaning a score of one meant disagree and a score of three meant agree. Factor four, which makes up 7.91% of the variance includes four questions that are all about stigmatizing. This factor was named the attitude of stigmatization of schizophrenia.

As seen in Table 2, item 23 (schizophrenia can be transmitted to others) has a negative loading on Factor 1 and requires reverse scoring in the analysis (Table 3).

Table 2: Component matrix

 

Component

1 2 3

4

17-Physical and chemical disorders in the brain are one of the possible causes of schizophrenia

0.84

     
1-Accidents or traumatic events are factors that cause or aggravate schizophrenia

0.82

     
2-Drug and alcohol misuse are factors that cause or aggravate schizophrenia

0.82

     
3-Schizophrenia is hereditary

0.81

     
4-Poverty is a factor that causes or aggravates schizophrenia

0.74

     
5-Stress is a factor that causes or aggravates schizophrenia

0.73

     
13-People with schizophrenia should be allowed to make decisions in their family  

0.94

   
14-It’s possible to establish a friendship with someone who has schizophrenia  

0.93

   
21-A person who has schizophrenia could have a favorable career path  

0.92

   
19-Those who have schizophrenia should be confined in care centers    

0.90

 
18-The main culprit in causing schizophrenia is the person himself    

0.89

 
11-It’s not necessary for people with schizophrenia to be admitted to medical centers      

0.67

6-A person with schizophrenia can live in society with others if they receive proper treatment      

0.57

23-Schizophrenia could be transmitted to others      

-0.52

12-A person with schizophrenia can get married and start a family      

0.38

Table 3: Perception and attitude toward schizophrenia among medical and general population.

   

 

  Leven’s test T-test  
Frequency Mean Standard deviation F Significance t df Sig. (2-tailed) Mean difference

D cohen

Perception of etiology General

394

9 2.98 0.77 0.37 3.37 786 0.001 0.697 2.89

Medical

394 8.30

2.80

Attitude of inefficacy General

394

5.85 2.12 4.57 0.03 5.41 786 0.001 0.835 2.16
Medical 394 5.01

2.20

Attitude of destigmatization General

394

2.72 1.12 0.41 0.52 1.71 786 0.086 0.144 1.81

Medical

394 2.87

1.23

Attitude of stigmatization General

394

8.33 1.35 12.87 0.001 6.78 786 0.001 0.558 1.49

Medical

394 7.61

1.49

Comparison of Perception and Attitude Scores Regarding Schizophrenia in the General and Medical Populations

In the comparison of the scores of perception and attitude towards schizophrenia in both general and medical populations, the variables attitude of inefficacy of schizophrenia (significance = 0.03) and attitude of stigmatization of schizophrenia (significance = 0.001) are significant. Since the lower the mean, the more positive the attitude is, the attitude of the general population (mean = 5.85) in ineffectiveness is more negative than the medical population (mean = 5.01). The attitude of the general population (mean = 8.33) in stigmatizing schizophrenia is more negative than the medical population (mean = 7.61).

Association Between Taking a Psychology or Psychiatry Course with Perception and Attitude Toward Schizophrenia

417 out of 788 participants have completed a psychology or psychiatry course unit. This means that 53% of the population has been trained in the field of psychiatric disorders and 47% has not been trained. The two groups have a significant difference in all variables except for the variable of destigmatization of schizophrenia (significance = 0.07), which means that people who have passed a psychology or psychiatry course (mean = 8.37) have a more positive perception than those who have not received psychiatric training (mean = 8.96). Also, those who passed a psychiatry course have a more positive attitude of inefficacy and stigmatization (mean = 5.10 and 7.67) than those who did not pass such a course (mean = 5.80 and 8.32) (Table 4).

Table 4: Taking a psychiatry or psychology course and its association with perception and attitude toward schizophrenia.

 

T-test

     
t df Sig. (2-tailed) Has taken a psych course Frequency

Mean

Perception of etiology

-2.86

773.27 0.004 Yes 417 8.37
No 371

8.96

Attitude of inefficacy

-4.54

775.36 0.001 Yes 417 5.10
No 371

5.80

Attitude of destigmatization

1.76

785.99 0.07 Yes 417 2.87
No 371

2.72

Attitude of stigmatization

-6.12

784.36 0.001 Yes 417 7.67
No 371

8.32

Association Between Family History of Psychiatric Disorders and Perception and Attitude Toward Schizophrenia

Only in the stigmatizing attitude of schizophrenia, there is a significant difference between those who have a family history of psychiatric disorders and those who do not (significance = 0.008). Those who have a family history (mean = 8.16) show a more negative attitude towards stigmatization than those who do not have a family history (mean = 7.86) (Table 5).

Table 5: Family history of psychiatric disorders and its association with perception and attitude toward schizophrenia.

 

T-test

     

t

df Sig. (2-tailed) Family history of psychiatric disorders Mean

Standard deviation

Perception of etiology

-0.72

784 0.46 Yes 8.55 2.87
No 8.71

2.94

Attitude of inefficacy

-1.25

784 0.20 Yes 5.29 2.24
No 5.50

2.17

Attitude of destigmatization

1.18

784 0.23 Yes 2.86 1.26
No 2.76

1.13

Attitude of stigmatization

2.66

784 0.008 Yes 8.16 1.52
No 7.86

1.53

Association Between the Level of Education of the General Population and the Perception and Attitude Towards Schizophrenia

There is no significant difference in the attitude and perception of schizophrenia between university graduates and non-university graduates in the general population (significance>0.05) (Table 6).

Table 6: Educational level of general population and its association with perception and attitude toward schizophrenia.

 

T-test

     
t df Sig. (2-tailed) Educational level Mean

Standard deviation

Perception of etiology

-0.86

392 0.39

University

8.87 2.90

Non-University

9.13

3.07

Attitude of inefficacy

0.27

392 0.78

University

5.87 2.15

Non-University

5.82

2.10

Attitude of destigmatization

0.71

392 0.47

University

2.76 1.13

Non-University

2.68

1.12

Attitude of stigmatization

-0.75

392

0.45

University

8.28

1.37

Non-University

8.38

1.34

Association Between Gender and Perception and Attitude Towards Schizophrenia

There is no significant difference in the attitude and perception of schizophrenia between males and females in the general and medical population (significance>0.05) (Table 7).

Table 7: Gender and its association with perception and attitude toward schizophrenia.

 

T-test

     
t df Sig. (2-tailed) Gender Frequency

Mean

Perception of etiology

0.72

786

0.46

Male

380

8.73

Female

408

8.58

Attitude of inefficacy

0.27

786

0.78

Male

380

5.45

Female

408

5.41

Attitude of destigmatization

0.58

786

0.55

Male

380

2.82

Female

408

2.77

Attitude of stigmatization

-0.10

786

0.91

Male

380

7.97

Female

408

7.98

Association Between Age and Perception and Attitude Towards Schizophrenia

Due to the heterogeneity of the sample of the medical population, it was not possible to compare the two populations in terms of age. Also, because the number of medical students from the age group of 41 and above becomes zero, it is not possible to compare age groups with each other (Table 8).

Table 8: Responses to the items of the perception and attitude toward schizophrenia questionnaire.

 

 

  Medical population     General population  
  Items Agree Neutral Disagree Agree Neutral

Disagree

1 Accidents or traumatic events are factors that cause or aggravate schizophrenia

67.3%

27.7% 5.1% 57.6% 34.8%

7.6%

2 Drug and alcohol misuse are factors that cause or aggravate schizophrenia

66.8%

28.2% 5.1% 62.7% 29.4%

7.9%

3 Schizophrenia is hereditary

65.2%

28.4% 6.3% 61.7% 31.7%

6.6%

4 Poverty is a factor that causes or aggravates schizophrenia

64.7%

31.2% 4.1% 47.7% 44.4%

7.9%

5 Stress is a factor that causes or aggravates schizophrenia

66.8%

28.2% 5.1% 56.9% 35.3%

7.9%

6 A person with schizophrenia can live in society with others if they receive proper treatment

27.4%

26.1% 46.4% 18.8% 29.4%

51.8%

7 A person with schizophrenia is violent and dangerous

30.5%

32.2% 37.3% 24.9% 29.9%

45.2%

8 A person with schizophrenia can be treated with medicine

18%

61.2% 20.8% 17.8% 60.7%

21.6%

9 Anyone may get schizophrenia in their lifetime

13.5%

29.4% 57.1% 16% 25.9%

58.1%

10 A person with schizophrenia has mental retardation

14%

26.9% 59.1% 13.7% 23.6%

62.7%

11 It’s not necessary for people with schizophrenia to be admitted to medical centers

20.1%

26.1% 53.8% 9.1% 12.4%

78.4%

12 A person with schizophrenia can get married and start a family

35.5%

41.9% 22.6% 17.3% 64%

18.8%

13 People with schizophrenia should be allowed to make decisions in their family

50.5%

31.2% 18.3% 30.5% 43.4%

26.1%

14 It’s possible to establish a friendship with someone who has schizophrenia

51.5%

29.7% 18.8% 38.1% 38.6%

23.4%

15 Lack of social support may cause or aggravate schizophrenia

78.9%

11.7% 9.4% 86.5% 8.6%

4.8%

16 If diagnosed early, schizophrenia is treatable

55.1%

21.3%

23.6% 60.9% 22.6%

16.5%

17 Physical and chemical disorders in the brain are one of the possible causes of schizophrenia

69.5%

25.4% 5.1% 58.1% 34.8%

7.1%

18 The main culprit in causing schizophrenia is the person himself

11.4%

19.5% 69% 8.9% 18.8%

72.3%

19 Those who have schizophrenia should be confined in care centers

10.2%

24.6% 65.2% 6.3% 23.6%

70.1%

20 A person with schizophrenia should have the same human rights as others

68.5%

18.5% 12.9% 80.5% 9.9%

9.6%

21 A person who has schizophrenia could have a favorable career path

51.3%

31% 17.7% 31% 34%

35%

22 Lack of awareness and insight in a schizophrenic patient causes ineffective treatment

70.3%

16.8% 12.9% 77.6% 13.5%

8.9%

23 Schizophrenia could be transmitted to others

4.3%

13.2% 82.5% 4.6% 20.8%

74.6%

Discussion

The present study was conducted to investigate the perception and attitude toward schizophrenia in both the general population and medical students in 2023. In this research, no significant relationship was found between gender and perception and attitude towards schizophrenia, these results are in line with the study conducted in Oman [31]. According to the findings, a significant relationship was found between the family history of psychiatric disorders and the attitude towards schizophrenia, that is, those who have a positive family history show a more negative attitude. Meanwhile, in the studies of Lebanon and Ethiopia, people who knew a person with mental illness among their acquaintances and family had a more positive attitude towards these patients [13,25]. At the same time, in the Baghdad research, no relationship was found between a positive family history and attitude toward mental disorders [26], this difference in results is justifiable. Since a precise and uniform definition of attitude and perception is not provided in different sources, sometimes the measured factor shows the respondent’s knowledge rather than the attitude and perception. Such questions are also seen in some of the mentioned studies and these questions may have measured the level of knowledge of the person. In this case, it is natural that if you have a positive family history of psychiatric disorders, the level of knowledge about these diseases will be higher than the rest of the people. Cultural and social differences in societies are another reason. In Western societies where there is more social support for these patients, treatments are more available and education about psychiatric disorders starts from a young age, it is natural that the attitude towards these patients is not so negative. However, in Iranian society, where education about psychiatric disorders is not provided, the government does not support such patients, and the high cost of treatment can lead to a more negative attitude towards psychiatric disorders. Sometimes people with stigma and negative attitudes towards these disorders wish to consider themselves exempt from these disorders. However, it seems that the results obtained in Iran are in line with the results seen in practice.

In our study, there was no statistically significant relationship between the level of education and the perception and attitude toward schizophrenia, which is in line with the studies of Oman and Baghdad [26,31]. At the same time, in the Ethiopian study, illiterate people or people who had non-university education showed a more positive attitude towards schizophrenia [14]. In the study of Lebanon, stigma is lower in women, young people, and university graduates than in other groups [25]. In our study, a relationship was found between having taken a psychology or psychiatry course with perception and attitude toward schizophrenia. This means that those who have completed psychology or psychiatry courses show a more positive attitude and perception. These results are in line with the Moroccan study [29]. In our study, a significant relationship was found in the attitude towards schizophrenia in the comparison of two general and medical populations, which means that the general population showed a more negative attitude than medical students. These results are in line with Amini’s study in Iran [30]. In our study, the general population recognized the lack of appropriate social support, drug and alcohol use, and genetics as the main causes of schizophrenia, which is in line with the results of studies in Ethiopia and Saudi Arabia [13,14,24]. Meanwhile, the medical community recognized the lack of appropriate social support, physical and chemical disorders in the brain, and stress as the main causes of schizophrenia, which is closer to the studies of Ghana and China [20,21].

According to the findings, almost half of the general population believes that schizophrenic patients are not dangerous and violent, which is in line with the study of Saudi Arabia [24], but not in line with the research of Ethiopia [13,14]. In our research, almost three-quarters of the general population and half of the medical population believe that it is necessary to admit schizophrenic patients to medical centers, which is closer to the Indian study [32]. Meanwhile, in the Ethiopian study, only 39.4% of the participants have the same belief [14]. At the same time, in the study of Ghana, 90% of the participants believed that schizophrenic patients should be hospitalized in treatment centers [20]. In our study, 80% of the general population agreed with the equality of human and social rights of people with schizophrenia with the rest of the population, which is not in line with the Ethiopian research [13]. Meanwhile, only 30% believed that these patients could have a favorable career future, which is in line with the studies of India and Saudi Arabia [24,33]. In our study, about 20% of the general population believed that schizophrenic patients can get married, and the same percentage believed that it is impossible to establish a friendship with schizophrenic patients. These results are in line with the study of Ghana and Canada [15,20], but not in line with the studies of southern Ghana and Saudi Arabia [24,34].

About 60% of the general population disagrees that schizophrenic patients have some kind of mental retardation, which is not in line with the study in Ghana [20]. This difference in results can be explained by the cultural differences and the level of education about psychiatric disorders in different societies. Only 16% of the general population believe that anyone may suffer from schizophrenia during their lifetime, which is much lower than studies in Ghana, Saudi Arabia, and southern Ghana [20,24,34]. One of the reasons for the difference in the results could be that by answering this question negatively, people want to rid themselves of this disease. Knowledge of the prevalence of schizophrenia in the general population can also be another influential factor. Since the prevalence of this disease in society is not very high, its estimation by the general population is not high either.

Conclusion

The results of this study showed that there is no significant relationship between gender and education level with perception and attitude toward schizophrenia. Those who have a family history of psychiatric disorders show a more negative attitude towards schizophrenia. A significant relationship between taking a psychology or psychiatry course with positive perception and attitude toward schizophrenia was also found. The general population has a more negative attitude towards schizophrenia than medical students. Lack of proper social support was recognized as the most common cause of schizophrenia.

Conflict of Interest

The authors declare that there is no conflict of interest regarding the publication of this paper.

Funding Statement

No financial support was received from any organization or persons.

Acknowledgments

We would like to extend our gratitude to Zanjan University of Medical Sciences for providing the opportunity to conduct the study and issuing the code of ethics.

Ethical Considerations

Zanjan University of Medical Sciences ethics committee provided the ethics code (IR.ZUMS.REC.1402.146) for this project.

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Examining the Effectiveness and Implementation of Patient Fertility Decision-Aid Tools for Cancer Patients: A Systematic Review

DOI: 10.31038/IJNM.2024542

Abstract

Objective: This study aims to comprehensively understand the actual application of fertility decision support tools in the cancer patient population and their impact on reproductive outcomes. By introducing eight assessment concepts, including acceptability, adoption, appropriateness, feasibility, fidelity, cost, penetration, and sustainability, the tool is comprehensively evaluated. Ultimately, this study aims to provide more comprehensive fertility decision support for cancer patients, offering valuable insights for future research and clinical practice in this domain.

Methods: In August 2023, a comprehensive search was conducted across a total of 14 databases, including MEDLINE, CINAHL, PubMed, PsycINFO, Embase, Scopus, Web of Science, AMED, Cochrane, Google Scholar, CNKI, WanFang Data, VIP, and Sinomed. The included literature underwent methodological quality and bias risk assessment using a mixed-methods appraisal tool.

Results: A total of 11 studies were included for analysis, comprising 5 randomized controlled trials (RCTs), 3 non-randomized controlled studies (N-RCTs), 2 mixed-methods studies, and 1 quantitative cross-sectional study. The findings indicate that research on fertility decision support tools primarily focused on aspects such as fertility-related knowledge, decisional conflict, post-decision regret, satisfaction with information acquisition, the patient’s willingness for reproduction, and the characteristics of the decision support tool. Newly identified themes encompassed decision preparedness, family involvement, informed consent, social support, health literacy, and quality of life. Among the 11 studies included, there was a greater emphasis on the aspects of acceptability, adoption, appropriateness, and feasibility. Other aspects received no attention, including fidelity, cost, penetration, and sustainability.

Conclusion: This study delves into the potential impacts on reproductive outcomes when cancer patients utilize fertility decision-support tools. Through a systematic literature review, new fertility-related themes were identified under the umbrella of fertility decision support tools. However, further research is warranted to comprehensively assess the clinical application of these tools, thereby elucidating their advantages and ultimately enhancing the quality of decision-making for patients facing fertility-related issues.

Keywords

Cancer, Fertility, Decision support, Fertility preservation, Fertility decision-aid tools, Clinical application, Systematic review

Introduction

Fertility is crucial for the continuation of human life, and early adulthood is traditionally regarded as the prime time for individuals to have their own biological children. However, among cancer survivors, reproductive function is often compromised or interrupted due to the destructive nature of cancer itself or the reproductive toxic effects of cancer treatments, particularly in adolescents and young adults (15-39 years old) [1]. With the continuous advancement of comprehensive treatments such as surgery, chemotherapy, radiation therapy, and hormonal therapy, the survival rates of young patients have significantly improved. However, these treatments have both short-term and long-term adverse effects on patients’ fertility, especially in terms of ovarian damage [2]. Studies have shown that, compared to the general population, this gonadal injury may lead to a higher incidence of premature ovarian insufficiency and azoospermia, resulting in early menopause or infertility [3]. With the steady improvement of five-year survival rates among cancer patients [4], over 85% of adolescent and young adult (AYA) cancer survivors express a strong desire for fertility and aspire to become biological parents [5]. Following treatment completion, fertility becomes a focal point of concern for patients, their families, and healthcare providers [6-9]. A comprehensive systematic review concluded that the majority (66%-100%) of cancer patients express a desire to understand the impact of treatment on their fertility [10]. Among young patients without children or with plans for future parenthood, this need and emphasis are even more pronounced, with the proportion of patients seeking relevant information ranging from 0% to 85% [11]. Many guidelines have provided recommendations regarding fertility concerns in patients. International guidelines emphasize that oncologists should inform patients about the potential for treatment-induced infertility and, when necessary, refer them to reproductive medicine specialists before formulating a cancer treatment plan [12]. Clinical practice guidelines from the American Society of Clinical Oncology suggest that healthcare professionals should engage in early discussions with female cancer patients who wish to preserve fertility before treatment in order to offer them more options [13]. Despite an increase in the proportion of fertility counseling initiated by oncologists, less than half of cancer patients are satisfied with the fertility counseling they receive, and the rate of referrals to fertility specialists remains low [14,15]. When receiving reproductive counseling, most patients express an urgent need for more timely, standardized, and written information to address their unmet specific informational needs [16]. However, approximately half of patients (43%-62%) still perceive the information they receive as inadequate and insufficient to meet their needs [17]. A cross-sectional study indicated that less than 10% of adolescent and young adult (AYA) cancer patients received fertility preservation services [18]. In clinical practice, cancer patients face numerous factors that influence their fertility choices. Firstly, they may lack sufficient fertility knowledge [19,20], and their awareness of fertility preservation methods may also be relatively low [21]. Furthermore, there is a severe deficiency in supportive information services related to fertility [22], compounded by the complexity of available fertility preservation options [23], making patients consider many intricate factors in their decision-making. Consequently, the choice of treatment regimen and timing limitations [24], as well as communication issues between patients and healthcare professionals [25], add to the decision-making challenges. Additionally, a range of ethical, legal, and ethical issues need to be considered [26-28]. It should be noted that not all fertility preservation options are suitable for every patient. Depending on factors such as the patient’s age, family status, cancer type, treatment modality, prognosis, and the timing before treatment initiation, some options may be more suitable than others when it comes to preserving fertility. Hence, patients face significant stress and conflicts in making fertility decisions. If patients do not receive comprehensive information about all fertility preservation options or lack support during the decision-making process, the difficulties in decision-making are exacerbated [17,29,30]. Simultaneously, oncology healthcare providers have also reported insufficient knowledge about fertility preservation methods and establishing connections [31,32]. To address these issues, decision support interventions have been developed for both patients and healthcare providers [33,34], aiming to enhance understanding of fertility preservation methods and reduce conflicts in the decision-making process for cancer patients [35].

Decision Aid Tools (PtDAs) are evidence-based tools that assist users in making preference-sensitive decisions by providing information specific to a particular health condition. They emphasize the benefits, risks, probabilities, and uncertainties associated with different choices related to a health condition, allowing patients to clarify their values and consider each option according to their personal preferences before making an informed decision [36]. To address decision-making regarding fertility preservation in female cancer patients, relevant guidelines recommend that healthcare professionals offer decision aids to women considering fertility preservation [12]. Numerous PtDAs for fertility preservation have been developed, and they have demonstrated positive initial application outcomes. These tools significantly enhance patients’ understanding of fertility preservation, reduce decisional conflict, and achieve high overall patient satisfaction. Over 115 randomized controlled trials have indicated that patient decision aids improve decisional conflict by increasing knowledge, fostering realistic expectations, building self-efficacy, and enhancing decision involvement [37]. A previous systematic review has indicated that patient decision aid tools (PtDAs) may play a crucial role in providing information and guiding decisions in this context. Wang et al. (2018) [35] conducted a systematic literature review on cancer patient decision aids to assess their effectiveness in supporting decisions related to fertility preservation. The results showed that decision aids enhanced awareness of fertility preservation, alleviated decisional conflict, and garnered high satisfaction ratings. As research continues to advance, an increasing number of relevant primary studies have emerged. However, in the routine assessment of such studies for clinical application, we have yet to observe systematic, comprehensive, and integrated research outcomes. The purpose of this study is to gain a deeper understanding of the specific impacts of decision-aid tools on reproductive outcomes and to comprehensively and systematically evaluate the actual effects of these tools in cancer patients. Additionally, we aim to identify potential new influencing factors and key determinants of reproductive decision-making that have not been previously mentioned in similar studies. Ultimately, we will utilize the concepts of acceptability, adoption, appropriateness, feasibility,fidelity, cost, penetration, and sustainability to conduct a comprehensive, multidimensional assessment of the application of decision aids, thereby providing a more comprehensive set of research results.

Materials and Methods

Data Sources and Study Selection

The systematic review followed the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analysis 2020 guidelines [38]. Inclusion Criteria: 1) fertility decision support tools as an intervention affecting reproductive outcomes in cancer patients; 2) patient involvement must be present in the development, assessment, implementation, and evaluation phases of fertility decision support tools; 3) in cases where multiple reports exist for the same study, the most recent research was included. If the same data was reported with different emphases, the study was still included; 4) forms of intervention included, but were not limited to, printed materials (such as pamphlets), online resources (such as websites), computer-based tools, or video-based resources; 5) both English and Chinese language literature were considered. Exclusion Criteria: 1) Literature reviews, books, unpublished articles, commentaries, protocols, conference abstracts, and research plans; 2) Literature meeting inclusion criteria but with data that could not be extracted.

Search Strategy

The literature search was conducted in August 2023, encompassing a total of 14 databases, including MEDLINE, CINAHL, PubMed, PsycINFO, Embase, Scopus, Web of Science, AMED, Cochrane, Google Scholar, CNKI, WanFang Data, VIP, and Sinomed. Duplicate articles were screened using EndnoteX 9.3.3. Two researchers conducted a joint review, browsing through the titles and abstracts of the literature before proceeding with full-text readings. In the event of any discrepancies, a third expert was consulted for adjudication.2.3 | Data extraction, quality assessment and synthesis

Data Extraction, Quality Assessment and Synthesis

Data extraction was carried out by two scholars. In the event of any discrepancies, a third party was consulted for resolution. The extracted information included general details and specific research outcomes. General details encompassed authorship, country of origin, study type, research phase, participant demographics, sample size source, research methodology, and data collection time points. Specific research outcomes included the type of decision aid tool, primary research objectives, measurement tools, and study results. Data related to implementation outcomes, as described by Proctor et al. (2011) [39], were extracted based on eight conceptually distinct implementation outcomes, which encompassed acceptability, adoption, appropriateness, feasibility, fidelity, implementation cost, penetration, and sustainability. It was deemed necessary to track and evaluate these cited references to ensure the report’s completeness. The included studies underwent quality and risk bias assessments using the Mixed Methods Appraisal Tool (MMAT). Each study was subjected to data synthesis based on two screening questions and five assessment criteria. In cases of score discrepancies, reviewers engaged in discussions until consensus was reached. This review strategy has been registered and is available on PROSPERO (ID: CRD42023452239).

Results

Study Selection

We employed a systematic literature search strategy, covering multiple databases and yielding a total of 2660 potentially relevant articles. These included MEDLINE (347 articles), CINAHL (172 articles), PubMed (422 articles), PsycINFO (23 articles), Embase (698 articles), Scopus (85 articles), Web of Science (618 articles), AMED (1 article), Cochrane (71 articles), Google Scholar (17 articles), CNKI (20 articles), WanFang Data (176 articles), VIP (2 articles), and Sinomed (8 articles). Subsequently, we utilized Endnote X9.3.3 software to screen and remove all duplicate records, resulting in the exclusion of repeated literature. Following this, a meticulous initial screening of titles and abstracts was conducted for 1619 articles. At this stage, we ultimately selected 123 articles for full-text reading. Two researchers independently reviewed the literature to ensure its content aligned with the research theme and type. During the process of full-text reading, a total of 112 articles were excluded. The reasons for exclusion included irrelevance to the research theme, unavailability of the full text, inconsistency in study type, and inclusion of research plans and conference abstracts, among others. During the process of including literature, any discrepancies were adjudicated by a third expert to ensure the rigor and accuracy of the research. Ultimately, we included 11 articles that met the objectives and requirements of our study. The specific search strategy can be found in the PRISMA flow diagram.

Study Quality

We conducted quality assessments for each included publication using the Mixed Methods Appraisal Tool (MMAT) standard. MMAT assesses the quality of qualitative or quantitative studies, with scores ranging from 25% (meeting one criterion) to 100% (meeting all criteria). In this study, the overall quality of the included research was relatively high. Specifically, seven studies achieved a quality score of 100%, while the remaining studies scored 80%. The lower scores were primarily attributed to poor reporting of methods in RCT studies, particularly in the aspects of randomization and allocation concealment.

Study Characteristics

Table 1 and Table 2 summarize the general characteristics and specific content of the included studies. The 11 selected articles span the years from 2012 to 2022 and were conducted in various countries or regions, including one from the United Kingdom [40], two from China [41,42], two from Australia [34,43], three from Switzerland [14,44,45], one from Germany [46], and two from the Netherlands [47,48]. These studies encompass a diverse range of types, consisting of five randomized controlled trials (RCTs) [14,42-44,47], three non-randomized controlled studies (N-RCTs) [45,46,48], two mixed-method studies [40,41], and one quantitative cross-sectional study [34]. The primary phases of the studies predominantly focus on the implementation of effects, with a total of 10 articles addressing this aspect [14,34,40-42,44-48], followed by tool development (2 articles) [41,45], feasibility (2 articles) [40,47], and acceptability (1 article) [43]. In total, 1300 subjects were involved in these studies, covering various types of cancer with a primary focus on breast cancer.

Table 1: General characteristics of 17 trials of patient decision-aids for cancer patient.

Table 2: Overview of Included Decision Aids, Treatment Coverage, Outcome Measures, and Key Findings.

Decision‐Aid Characteristics

Decision aid tools were incorporated in the studies in various formats: four studies utilized paper-based tools [34,40,43,46], three studies employed online-based tools [14,45,48], three studies were based on web platforms [41,44,47], and one study did not specify the type of decision aid tool used [42].

Effect of Decision‐Aids on Decisional Outcomes

Fertility-related Knowledge

Six studies investigated the impact of fertility decision support systems on patients’ fertility-related knowledge. This includes two randomized controlled trials (RCTs) [44,47], two non-randomized controlled trials [45,46], one cross-sectional study [34], and one quasi-experimental study [48]. These studies employed researcher-developed questionnaires for measurement. In these studies, Peate et al.’s research [34] found no significant difference in knowledge scores between the intervention and control groups at one month, but at 12 months, the DA group had lower knowledge scores compared to the routine care group. Ehrbar et al.’s study [45] indicated that after fertility preservation knowledge counseling (T1), there was no significant difference in knowledge between the two groups. However, in the aspect of “egg freezing,” the intervention group showed significantly higher knowledge and confidence. Conversely, a recent study [44] discovered no significant difference in patients’ knowledge about existing fertility preservation methods between the two groups. On the other hand, Borgmann-Staudt et al.’s study [46] demonstrated that in terms of impaired fertility and preservation knowledge, patients in the intervention group had higher average knowledge scores than the control group at both 3 months post-diagnosis (T0) and 6 months post-diagnosis (T1), but these differences were not significant at both time points. Garvelink et al.’s study [47] found significant differences in knowledge between baseline and 6 weeks post-baseline (T1), as well as between baseline and 6 months post-baseline (T2). However, there were no significant knowledge differences between the intervention group and the control group. Additionally, Garvelink et al.’s study [48] pointed out that different types of decision support tools did not significantly affect the time spent using the tool and the number of pages viewed. However, regardless of the type of tool used, they significantly elevated the level of knowledge, resulting in an 81% relative increase. Furthermore, there was a positive correlation between the time spent using the tool and the level of knowledge.

Decision Conflict

Among the 7 studies evaluating the impact of fertility decision support tools on decision conflict, the study designs included 3 randomized controlled trials (RCTs) [14,42,47], 1 non-randomized controlled trial [45], 1 mixed-methods study [40], 1 quasi-experimental study [48], and 1 cross-sectional study [34]. These studies employed the Decisional Conflict Scale for assessment. Jones et al.’s study [40] showed that that the level of decision conflict in the control group was generally below the average level. Huang et al. [42] assessed the impact of oncology fertility education for breast cancer nurses and patients on decision-conflict. The results indicated that, with similar scores on the Fertility Intention Scale (FIS) among patients, the experimental group had significantly lower decision conflict scores than the control group. Peate et al. [34] used the Decisional Conflict Scale for decision conflict measurement and found that participants receiving the DA experienced a significantly greater reduction in decision conflict over 12 months compared to participants receiving standard care. At 1 month, the average difference in DCS between the two groups was negligible, but at 12 months, the DA group had lower Decisional Conflict Scale scores than the routine care group. Additionally, Ehrbar et al.’s study in 2019 [14] found that participants who had already made a decision about fertility preservation after consultation (T1) had significantly lower decision conflict scores. The intervention group had significantly lower decision conflict scores compared to the control group. At 1 month after consultation (T2), the intervention group also had significantly lower decision conflict scores in total and on both sub-scales compared to the control group. However, 12 months after consultation (T3), the decision conflict difference between the two groups was no longer significant. Furthermore, Ehrbar et al.’s 2018 study [45] found that the intervention group had slightly higher overall decision conflict scores than the control group, but these differences were not significant. In another study, Garvelink et al.’s results [47] showed that women who received the booklet scored significantly lower on the “effective decision” sub-scale compared to women who received the decision aid (DA). Finally, Garvelink et al.’s study [48] found that women who used the values clarification exercise had a significantly different tool use time compared to those who did not use it, but there was no difference compared to those who were unable to use the exercise. Women who used the exercise performed better in decision conflict, value clarification, decision support, and informed decision.

Decision Regret

In the included literature, a total of four studies addressed decision regret, including three randomized controlled trials (RCTs) [14,44,47] and one cross-sectional study [34]. These studies all employed the Decisional Regret Scale (DRS) for measurement. The study by Peate et al. [34] observed that at one month, there were no significant differences in DRS scores regarding fertility-related decisions between groups. However, at twelve months, after adjusting for educational levels, participants who received Decision Aid (DA) exhibited significantly lower levels of decision regret. On the other hand, findings from the studies by Ehrbar et al. in 2019 and 2021 [14,44] indicated that patients in both intervention and control groups reported overall low levels of decision regret, with the intervention group consistently lower than the control group. However, these differences did not reach statistical significance. It is noteworthy that at one month post-consultation (T2), no significant correlation was found between decision conflict and decision regret. However, at twelve months post-consultation (T3), a strong correlation emerged. Contrastingly, the study by Garvelink et al. [47] found no statistically significant differences in anticipated regret between measurement time points or between groups. It is worth noting that both groups exhibited a slight trend of increased regret between baseline assessments after six weeks (T1) and six months (T2), although this increase was not significant.

Information Satisfaction

Incorporated into the research are three studies that delve into information satisfaction. These include one randomized controlled study [14], one non-randomized controlled study [45], and one cross-sectional study [34]. The assessment tools utilized in these studies were custom-designed questionnaires by the researchers. Peate et al.’s study [34] found that participants who underwent decision aid (DA) were more satisfied with information regarding the impact of breast cancer treatment on fertility and different fertility options. Ehrbar et al.’s 2018 research [45] demonstrated that decision support tools were considered helpful in the decision-making process, with the majority of participants expressing willingness to recommend them to other women. Their 2019 study likewise affirmed [14] that DA participants reported higher satisfaction levels and perceived the use of DAs as beneficial.

Fertility Intentions

In addressing the influence of decision support tools on fertility intentions, we included a total of three randomized controlled trials [14,42,44]. One study utilized the Fertility Intentions Scale (FIS) for measurement [42], while the remaining two employed patient-designed questionnaires. Huang et al.’s study assessed changes in patients’ fertility intentions using the FIS scale after employing decision support tools. The results revealed that, with similar scores on the Fertility Intentions Scale (FIS), the experimental group exhibited significantly lower decisional conflict scores compared to the control group. This indicates the effectiveness of decision-support tools in reducing decisional conflict. Ehrbar et al.’s study [14] found a notably higher positive attitude towards fertility preservation compared to a negative attitude, with no significant differences between the two groups. Additionally, attitudes and willingness to undergo fertility preservation remained stable over time, demonstrating consistency and stability in patients’ attitudes towards fertility preservation. Furthermore, Ehrbar et al.’s 2021 research [44] arrived at similar conclusions. They observed significantly higher positive attitudes in both groups compared to negative attitudes. The control and intervention groups showed comparable scores in positive attitudes, negative attitudes, and willingness to utilize fertility preservation methods. Participants’ attitudes and intentions towards fertility preservation remained stable from post-consultation (T1) to 12 months post-consultation (T3), indicating that the impact of decision support tools on fertility attitudes and intentions remains consistent over a period of time.

Characteristics of Decision Support Tools

In the evaluation of fertility decision support tools, we included a total of four studies, comprising two randomized controlled trials [43, 44] and two mixed-method studies [40,41]. Jones et al. [40] assessed the utility of the decision tool using the QQ-10 scale and ultimately concluded that the CFM tool is acceptable and highly beneficial for women making decisions regarding fertility preservation treatment. Additionally, Huang et al. [41] developed an electronic system for tumor fertility protection and examined its comprehensibility, feasibility, and usability. The study found high usability ratings from both patients and healthcare providers. Furthermore, the social support questionnaire assessment indicated effectiveness of the tool in providing information and practical support, particularly for breast cancer patients. Ussher et al. [43] evaluated the perceived acceptability and impact of the intervention. The results showed that the majority of participants gave positive feedback on the educational resources, considering them easy to understand, user-friendly, containing relevant information, and addressing fertility concerns more effectively than other sources of information. Moreover, Ehrbar et al.’s [44] study reached similar conclusions. They found significantly higher positive attitudes in both groups compared to negative attitudes. The control and intervention groups showed comparable scores in positive attitudes, negative attitudes, and willingness to use fertility preservation methods. Participants’ attitudes and intentions towards fertility preservation remained stable from post-consultation (T1) to 12 months post-consultation (T3), with no significant changes observed.

Others

Fertility decision support tools play a positive role in decision readiness [40,41], family involvement [34,46], informed consent [34,48], social support [41], and health literacy [43], providing robust support and guidance for patients facing decisions about fertility preservation treatment. However, we encountered different results in terms of quality of life. Within the context of fertility decision-making, we observed relatively limited coverage of various aspects under this theme. Nevertheless, despite the relatively small number of studies involved, we were able to identify some intriguing patterns and draw some conclusions based on existing data. Therefore, we conducted a comprehensive review based on logical grouping, highlighting the following key themes: decision readiness, family involvement, informed consent, social support, health literacy, and quality of life. First and foremost, decision readiness emerged as a crucial topic. Research indicates that decision support tools play a positive role in enhancing patients’ level of decision readiness. By employing these tools, patients gain a more comprehensive understanding of information related to fertility preservation treatment, providing a solid foundation for their decision-making process. Jones et al.’s study [40] found that fertility decision support tools were considered acceptable and highly beneficial for women preparing to make decisions about fertility preservation treatment. Additionally, Huang et al.’s 2022 study [41] emphasized the importance of providing ample knowledge about breast cancer and related treatments, addressing participants’ concerns about fertility and fertility preservation choices. Furthermore, family involvement and support also play an indispensable role in the decision-making process. Studies suggest that the active participation of partners or family members can alleviate patient anxiety and have a positive impact on decision outcomes. Obtaining support from family members during the decision-making process provides patients with additional confidence and peace of mind, enabling them to make decisions that align with their own wishes. Borgmann-Staudt et al.’s study also confirmed that specially designed educational materials about fertility preservation improved the knowledge and autonomy of both patients and parents [46]. However, Peate et al.’s study found no significant difference in partner involvement between the two groups [34]. Additionally, having a comprehensive understanding of relevant information is crucial for making informed decisions. By thoroughly comprehending various pieces of information during the decision-making process, patients can better grasp the implications and consequences of various choices, allowing them to make fertility preservation decisions that align with their individual circumstances. Garvelink et al.’s study also emphasized the importance of information, with women using value clarification exercises performing better in decision conflict, value clarification, decision support, and informed decision-making [48]. The effectiveness of social support networks also plays a crucial role in the decision-making process. When facing decisions about fertility preservation treatment, receiving assistance from social support networks helps patients better understand and address various issues, providing strong support for the decision-making process. Huang et al.’s study found that providing ample knowledge about breast cancer and related treatments was crucial for participants in making decisions about fertility and fertility protection [41]. Lastly, having good health literacy is an essential component of the decision-making process. It helps patients better understand and participate in the decision-making process, enhancing their capacity for making informed health decisions. The study found that after the intervention, patients’ health literacy significantly improved, including functional, interactive, and critical health literacy [43]. It’s worth noting that in the included studies, intervention had different expected outcomes on participants’ quality of life, with no change or varying degrees of decline observed. Jones et al. [40] assessed the quality of life of women facing decisions about preserving fertility after receiving a cancer diagnosis using the EQ-5D-3L scale. The baseline EQ-5D-3L average scores indicated lower levels of problems in five quality of life domains. Apart from daily activities (p = 0.018), there were no other significant differences in quality of life scores based on EQ-5D data before and after receiving CFM. Ussher et al.’s study noted that at the baseline stage, the Health Promotion (HP) group, through self-intervention with educational resources, had significantly higher quality of life scores than the Standard Health (SH) group, showing a statistical difference. However, after the intervention, both groups experienced a decline in quality of life, with the SH group’s average quality of life score significantly lower than that of the HP group.

Implementation Results

Among the studies included, at least seven provided data on implementation results (see Table 3 Additional file 6). A total of five studies discussed acceptability [14,34,40,43,45], three discussed adoption [14,41,45], one discussed appropriateness [43], and two discussed feasibility [41,47]. Other aspects were not addressed, including fidelity, cost, penetration, and sustainability. The measurement method primarily involved surveying patients. In terms of acceptability, our main focus was focused on the perspectives of patients, healthcare providers, or other stakeholders to determine whether there was widespread acceptance and satisfaction. In the five included studies, researchers assessed participants’ satisfaction with fertility decision support tools through self-made questionnaires [14,34,40,43,45]. In terms of adoption, the attention was on the extent of implementation strategy dissemination across different organizations or regions. In the three studies included, one study measured this through the System Usability Scale (SUS) Scores questionnaire [41], and all three results indicated willingness to propagate and use this tool [14,41,45]. Appropriateness considered contextual factors, such as patient characteristics and healthcare environments, to assess the suitability of the strategy. Only one study measured results in this aspect, showing that clinical healthcare providers had confidence in recommending the tool’s use to patients [43]. Feasibility focused on resource feasibility and implementation feasibility assessments, including potential obstacles and challenges. Two studies addressed this theme, and the research results both showed that the tool is feasible and effective, with potential for further validation through large-scale studies in the future [41,47].

Discussion

In this study, we conducted a systematic review of the impact of fertility decision support on fertility outcomes in cancer patients. The outcome indicators primarily covered fertility knowledge, decisional conflict, decision regret, information satisfaction, fertility intentions, and tool characteristics. Additionally, we discovered a range of new research findings, including the effects on patient decision-making preparedness, family involvement, patient informedness, social support, patient health literacy, and quality of life. Upon comprehensively analyzing the application of decision support tools in clinical practice, we observed that the majority of studies primarily focused on assessing the acceptability, adoption, appropriateness, and feasibility of the tools. The fertility decision support system has shown a certain impact on patients’ knowledge related to fertility preservation. However, this impact is influenced by multiple factors and requires continuous optimization and improvement in practice. Additionally, specific support for fertility preservation and its long-term effects need further research and attention. From the research results, there is considerable heterogeneity, and the impact on fertility knowledge is time-dependent, yielding different results at different times. Peate et al.’s study [34] found that the fertility decision support system did not have a significant impact on knowledge scores in the short term, but in the long term, the DA group’s knowledge scores were significantly lower than than those of the standard care group. Future research should pay more attention to and optimize the long-term effects of fertility decision support systems. Furthermore, Garvelink et al.’s study [48] indicates that different types of decision-support tools do not significantly affect the time spent using the tool or the number of pages viewed. However, regardless of the type of tool used, they significantly increase knowledge levels, with a relative increase of 81%. This underscores that the design of decision support tools may be more important than specific types, as their primary function is to enhance patients’ knowledge levels.

Decision conflict is an issue that cancer patients need to pay attention to when facing the decision of fertility preservation. Decision support tools can reduce the level of decision conflict in patients to some extent. However, there are certain differences in results under different research conditions, so the application of decision support tools needs to be considered comprehensively according to specific situations in practice. At the same time, long-term tracking and evaluation are also necessary to understand the persistence and stability of the decision. Huang et al.’s study shows that after receiving cancer fertility education, the decision conflict scores of the experimental group were significantly lower than those of the control group, indicating that an improved education level can make patients more clear about their choices when making decisions [42]. The results of Peate et al.’s study present an interesting trend. In the short term, the difference in decision conflict between the two groups is not significant [34]. However, with long-term observation, patients receiving decision support were significantly lower than those receiving routine care, indicating that fertility decision support tools play a positive role in the long-term decision-making process. On the other hand, Ehrbar et al.’s study also found that after consultation, participants who had already made the decision to preserve fertility had significantly lower decision conflict scores, and the decision conflict scores of the intervention group were also significantly lower than those of the control group. However, after long-term follow-up, the difference in decision conflict between the two groups was no longer significant, which may be because the stability of the decision gradually tended to be consistent over time. The analysis of multiple studies shows that the overall level of decision conflict is relatively low, indicating that fertility decision support tools can provide effective support, reducing the contradictions and confusion in the decision-making process. Decision regret is a complex and multidimensional psychological state in the process of fertility preservation treatment decision-making. Different research results may be influenced by various factors, including individual characteristics, education level, and the timing of using decision support tools. In future research, it may be considered to further explore these influencing factors in order to provide more targeted decision support and intervention measures to alleviate the potential decision-regret emotions that patients may face. Decision support tools have achieved significant effectiveness in providing fertility-related information, enabling patients to have a clearer understanding of reproductive knowledge. The discussion of information satisfaction in the study focuses on evaluating the effectiveness of decision support tools in helping patients obtain fertility-related information and the satisfaction of patients with this information. At the same time, patients’ satisfaction with the use of decision support tools is also high, and they are willing to recommend them to other women. This provides strong support for the further promotion and application of decision support tools. Peate et al.’s research results show that participants who received decision support were more satisfied with information regarding the impact of breast cancer treatment on fertility and different reproductive choices [34]. This indicates that decision support tools play a positive role in providing information, enabling patients to have a more comprehensive understanding of reproductive knowledge. The multiple studies by Ehrbar et al. [14,45] also indicate that patients participating in decision support are satisfied with the use of the tool and believe that it has a positive impact on their decision-making process. However, it is worth noting that there are certain differences in results under different research conditions, so the application of decision support tools needs to be comprehensively considered according to specific situations in practice to ensure that patients can obtain the maximum level of information satisfaction. The decision support tool has achieved positive results in influencing the willingness for fertility preservation, reducing the patients’ decision conflict, and maintaining a positive attitude towards fertility preservation. This provides strong support for the application of decision support tools in clinical practice. It also reminds us that in the design and implementation of decision support tools, it is important to provide patients with comprehensive and clear information about fertility preservation to better assist them in making decisions that align with their own intentions. The results of Huang et al.’s study [42] indicate that the experimental group had significantly lower decision conflict scores compared to the control group. This suggests that the decision support tool has achieved significant effectiveness in reducing patients’ decision conflict. It is evident that the decision support tool provides patients with more comprehensive and clear information about fertility preservation, enabling them to have a clearer understanding of their choices. Additionally, the studies by Ehrbar et al. in 2019 and 2021 [14,44] show that participants’ attitudes towards fertility preservation were significantly more positive than negative, and this attitude remained stable over time. This indicates that patients’ attitudes towards fertility preservation are relatively stable and consistent. The decision support tool did not change the patients’ attitudes but rather provided additional information based on their existing attitudes.

The decision support tool has demonstrated significant effectiveness in providing fertility preservation information and support, offering strong assistance for patients to make decisions in line with their own preferences. This underscores the importance of considering patients’ needs and providing easily understandable, user-friendly, and comprehensive information when designing and implementing decision support tools, in order to better assist patients in their decision-making process. The study by Jones et al. [40], which utilized the QQ-10 to assess the usability of the CFM tool, yielded results indicating that the tool is acceptable and highly useful for women preparing to make decisions about fertility preservation treatment. This indicates the tool’s effectiveness in providing information and support. Additionally, the electronic system for tumor fertility protection developed by Huang et al. [41] received positive evaluations in terms of comprehensibility, feasibility, and usability. Both patients and healthcare providers considered it highly usable. Furthermore, the tool demonstrated effectiveness in providing information and practical support, particularly for breast cancer patients. In the research on fertility preservation decision support tools, we have made intriguing new findings that play a positive role in decision preparedness, family involvement, informed consent, social support, health literacy, and quality of life. Firstly, decision preparedness has been confirmed as a crucial issue. Decision support tools actively contribute to enhancing patients’ level of decision preparedness. By utilizing these tools, patients can gain a more comprehensive understanding of information related to fertility preservation treatment, providing a solid foundation for decision-making. Particularly, in the study by Jones et al. [40], fertility preservation decision support tools were deemed acceptable and highly useful for women preparing to make decisions about fertility preservation treatment. Secondly, family involvement and support play an indispensable role in the decision-making process. The active participation of partners or family members can alleviate patient anxiety, positively influence decision outcomes, and garnering support from family members can provide patients with added confidence and reassurance, enabling them to make decisions that align with their preferences more resolutely. Furthermore, having a thorough understanding of relevant information is crucial for making informed decisions. By comprehensively understanding various pieces of information during the decision-making process, patients can better grasp the impacts and consequences of various choices, thereby making fertility preservation selections that align with their individual circumstances. The effectiveness of a social support network also plays a vital role in the decision-making process. Receiving assistance from a social support network can help patients better comprehend and address various issues, providing robust support for decision-making. Finally, having good health literacy is an essential component of the decision-making process. It aids patients in better understanding and participating in the decision-making process, elevating their capacity for making health-related decisions. The research found that after intervention, patients’ health literacy significantly improved, including functional, interactive, and critical health literacy [43]. Regarding quality of life, the reasons behind changes in quality of life after fertility preservation decision support will also need to be further explored in the future. In summary, though research on these aspects is relatively limited, we have uncovered numerous intriguing patterns and conclusions from existing data. Decision preparedness, family involvement, informed consent, social support, health literacy, and quality of life are all crucial topics worthy of attention in the fertility preservation treatment decision-making process. The positive impacts of these aspects provide robust support and guidance for patients when facing decisions about fertility preservation treatment, further promoting the rationality and personalization of medical decisions. These new findings offer valuable references for future research and clinical practice.

Clinical Limitations

While we have made comprehensive efforts to discuss the application of fertility preservation decision support tools in clinical settings in this study, it is important to acknowledge that there are still some limitations in certain aspects. Firstly, in terms of factors such as credibility, cost, penetration, and sustainability, there may be insufficient data or the ability to provide a comprehensive summary in the current research. However, we can propose some potential improvement suggestions from the perspective of future research and practice. It is recommended to consider tool reliability as a crucial assessment criterion in future studies and explore how to ensure the stability and credibility of the tool in practice. Additionally, from the standpoint of technological progress and development trends, discussing how to reduce the cost of the tool to promote its widespread clinical application is worthwhile. Furthermore, strengthening the promotion and training of this tool is also an important initiative to increase its prevalence in clinical practice. It is essential to think about how to ensure the tool remains effective in long-term use, such as through regular updates and enhancements. For other aspects of the discussion, it should be noted that not all possible scenarios have been covered in the current research. In future studies, further exploration of these aspects will be necessary to gain a comprehensive understanding of the effectiveness of fertility preservation decision-support tools in clinical practice. Despite our best efforts to address these limitations in this study, it is crucial to exercise caution when generalizing these results to other contexts.

The limitations of this study include the potential for significant bias and contradictory results due to inconsistent assessment criteria in the measurement methods employed. This limitation could impact the accurate understanding and assessment of the psychological state in the decision-making process regarding fertility preservation treatments. Furthermore, factors such as sample selection and study design may introduce selection bias and extrapolation constraints, thereby restricting the generalizability and applicability of the study’s findings to a certain extent. Therefore, the inconsistency in measurement methods within the study may lead to contradictions among research outcomes. This underscores the need for future research to carefully and meticulously select appropriate measurement tools while taking into full consideration various potential influencing factors in order to enhance the reliability and robustness of research results. This study, based on existing data and our inclusion methodology, has made every effort to ensure comprehensiveness. However, given the breadth of the research field and the nature of database searches, we acknowledge the possibility that some studies, especially those conducted under specific conditions, may not have been included. Nevertheless, we believe that this does not diminish the uniqueness and importance of our study. Given the current limitations of this research, we encourage future researchers to continue exploring this field. We believe that such efforts will contribute to enriching and refining the knowledge base in this area, providing more comprehensive and effective support for future clinical practices.

Clinical Implications

Firstly, through a comprehensive analysis of the latest research findings, we can provide clinical practitioners with an up-to-date and authoritative body of scientific evidence to support the development and application of fertility decision-making tools. Secondly, it can facilitate patient involvement in decision-making. Fertility decisions are highly personalized and sensitive topics, making patient involvement crucial. By furnishing patients with scientific foundations, we empower them with more agency and confidence, enabling active participation in the decision-making process. This not only ensures that patients feel heard but also enhances their trust in treatment options, thereby improving the overall efficacy of the treatment process. Additionally, we can assist patients in better comprehending the various influencing factors of fertility decisions through information and education, enabling them to make more informed choices. Lastly, our research provides practical guidance and decision support. Clinical healthcare providers can tailor the most appropriate fertility decision plans for each patient based on this scientific evidence, thus maximizing patients’ fertility aspirations. Simultaneously, patients can, with this evidence, participate more confidently in the treatment process, thereby collectively achieving the most desirable treatment objectives.

Conclusion

The primary objective of this study is to explore the tangible impact of fertility preservation decision aid tools (PtDAs) among cancer patients. Through a comprehensive assessment encompassing various aspects such as fertility-related knowledge, decision conflicts, post-decision regret, information satisfaction, fertility intentions, and tool characteristics, this research furnishes robust evidence for a deeper understanding of the practical implications of PtDAs within the cancer patient population. It offers valuable insights for clinical nursing practices, potentially serving as a valuable complement to current fertility care practices. Beyond clinical counseling, this research aims to ensure the fulfillment of the demand for high-quality information and support.

Declarations

Ethical Approval and Consent to Participate

Not applicable

Funding

No funding

Availability of Data and Materials

Data sharing not applicable to this article as no datasets were generated or analysed during the current study.

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