Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-Analysis

Thyroid disease is a very common condition that influences the entire human body, including cognitive function and mental health. As a result, thyroid disease has been associated with multiple neuropsychiatric conditions. However, the relationship between thyroid dysfunction and suicide is still con...

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Main Authors: Freddy J. K. Toloza, Yuanjie Mao, Lakshmi Menon, Gemy George, Madhura Borikar, Soumya Thumma, Hooman Motahari, Patricia Erwin, Richard Owen, Spyridoula Maraka
Format: Article
Language:English
Published: MDPI AG 2021-07-01
Series:Medicina
Subjects:
Online Access:https://www.mdpi.com/1648-9144/57/7/714
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author Freddy J. K. Toloza
Yuanjie Mao
Lakshmi Menon
Gemy George
Madhura Borikar
Soumya Thumma
Hooman Motahari
Patricia Erwin
Richard Owen
Spyridoula Maraka
author_facet Freddy J. K. Toloza
Yuanjie Mao
Lakshmi Menon
Gemy George
Madhura Borikar
Soumya Thumma
Hooman Motahari
Patricia Erwin
Richard Owen
Spyridoula Maraka
author_sort Freddy J. K. Toloza
collection DOAJ
description Thyroid disease is a very common condition that influences the entire human body, including cognitive function and mental health. As a result, thyroid disease has been associated with multiple neuropsychiatric conditions. However, the relationship between thyroid dysfunction and suicide is still controversial. We conducted a systematic review and meta-analysis to describe the association of thyroid function with suicidal behavior in adults. We searched four data bases (MEDLINE, EMBASE, PsycINFO, and Scopus) from their inception to 20 July 2018. Studies that reported mean values and standard deviation (SD) of thyroid hormone levels [Thyroid-stimulating hormone (TSH), free thyroxine (FT4), free triiodothyronine (FT3), total thyroxine (TT4), and total triiodothyronine (TT3)] in patients with suicidal behavior compared with controls were included in this meta-analysis. The abstracts and papers retrieved with our search strategies were reviewed independently and in duplicate by four reviewers for assessment of inclusion criteria and data extraction, as well as for evaluation of risk of bias. Random-effects models were used in this meta-analysis to establish the mean difference on thyroid function tests between groups. Overall, 2278 articles were identified, and 13 studies met the inclusion criteria. These studies involved 2807 participants, including 826 participants identified with suicidal behavior. We found that patients with suicide behavior had lower levels of FT3 (−0.20 pg/mL; <i>p</i> = 0.02) and TT4 (−0.23 µg/dL; <i>p</i> = 0.045) compared to controls. We found no differences in either TSH, FT4, or TT3 levels among groups. With our search strategy, we did not identify studies with a comparison of overt/subclinical thyroid disease prevalence between patients with and without suicide behavior. The studies included in this meta-analysis had a low-to-moderate risk of bias. In the available literature, the evidence regarding the association of thyroid disorders and suicidal behavior is limited. We found that patients with suicidal behavior have significantly lower mean FT3 and TT4 levels when compared to patients without suicidal behavior. The clinical implications and pathophysiologic mechanisms of these differences remain unknown and further research is needed.
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spelling doaj.art-76f3f7f9204d46c7a2c466b13332f30f2023-11-22T04:21:35ZengMDPI AGMedicina1010-660X1648-91442021-07-0157771410.3390/medicina57070714Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-AnalysisFreddy J. K. Toloza0Yuanjie Mao1Lakshmi Menon2Gemy George3Madhura Borikar4Soumya Thumma5Hooman Motahari6Patricia Erwin7Richard Owen8Spyridoula Maraka9Division of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USADivision of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USADivision of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USADivision of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USADivision of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USADivision of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USADivision of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USAMayo Clinic Libraries, Mayo Clinic, Rochester, MN 55902, USADepartment of Psychiatry, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USADivision of Endocrinology and Metabolism, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USAThyroid disease is a very common condition that influences the entire human body, including cognitive function and mental health. As a result, thyroid disease has been associated with multiple neuropsychiatric conditions. However, the relationship between thyroid dysfunction and suicide is still controversial. We conducted a systematic review and meta-analysis to describe the association of thyroid function with suicidal behavior in adults. We searched four data bases (MEDLINE, EMBASE, PsycINFO, and Scopus) from their inception to 20 July 2018. Studies that reported mean values and standard deviation (SD) of thyroid hormone levels [Thyroid-stimulating hormone (TSH), free thyroxine (FT4), free triiodothyronine (FT3), total thyroxine (TT4), and total triiodothyronine (TT3)] in patients with suicidal behavior compared with controls were included in this meta-analysis. The abstracts and papers retrieved with our search strategies were reviewed independently and in duplicate by four reviewers for assessment of inclusion criteria and data extraction, as well as for evaluation of risk of bias. Random-effects models were used in this meta-analysis to establish the mean difference on thyroid function tests between groups. Overall, 2278 articles were identified, and 13 studies met the inclusion criteria. These studies involved 2807 participants, including 826 participants identified with suicidal behavior. We found that patients with suicide behavior had lower levels of FT3 (−0.20 pg/mL; <i>p</i> = 0.02) and TT4 (−0.23 µg/dL; <i>p</i> = 0.045) compared to controls. We found no differences in either TSH, FT4, or TT3 levels among groups. With our search strategy, we did not identify studies with a comparison of overt/subclinical thyroid disease prevalence between patients with and without suicide behavior. The studies included in this meta-analysis had a low-to-moderate risk of bias. In the available literature, the evidence regarding the association of thyroid disorders and suicidal behavior is limited. We found that patients with suicidal behavior have significantly lower mean FT3 and TT4 levels when compared to patients without suicidal behavior. The clinical implications and pathophysiologic mechanisms of these differences remain unknown and further research is needed.https://www.mdpi.com/1648-9144/57/7/714suicidethyroid functionhypothyroidismhyperthyroidism
spellingShingle Freddy J. K. Toloza
Yuanjie Mao
Lakshmi Menon
Gemy George
Madhura Borikar
Soumya Thumma
Hooman Motahari
Patricia Erwin
Richard Owen
Spyridoula Maraka
Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-Analysis
Medicina
suicide
thyroid function
hypothyroidism
hyperthyroidism
title Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-Analysis
title_full Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-Analysis
title_fullStr Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-Analysis
title_full_unstemmed Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-Analysis
title_short Association of Thyroid Function with Suicidal Behavior: A Systematic Review and Meta-Analysis
title_sort association of thyroid function with suicidal behavior a systematic review and meta analysis
topic suicide
thyroid function
hypothyroidism
hyperthyroidism
url https://www.mdpi.com/1648-9144/57/7/714
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