Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort Studies

Background. Evidence on the association between subclinical thyroid dysfunction and the risk of cardiovascular outcomes are conflicting. Methods and Results. PubMed, EMbase, Web of Science, Cochrane Library, and China Biology Medicine (CBM) databases were searched from inception to July 10, 2016. A...

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Main Authors: Jing Sun, Liang Yao, Yuan Fang, Ruifei Yang, Yaolong Chen, Kehu Yang, Limin Tian
Format: Article
Language:English
Published: Wiley 2017-01-01
Series:International Journal of Endocrinology
Online Access:http://dx.doi.org/10.1155/2017/8130796
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author Jing Sun
Liang Yao
Yuan Fang
Ruifei Yang
Yaolong Chen
Kehu Yang
Limin Tian
author_facet Jing Sun
Liang Yao
Yuan Fang
Ruifei Yang
Yaolong Chen
Kehu Yang
Limin Tian
author_sort Jing Sun
collection DOAJ
description Background. Evidence on the association between subclinical thyroid dysfunction and the risk of cardiovascular outcomes are conflicting. Methods and Results. PubMed, EMbase, Web of Science, Cochrane Library, and China Biology Medicine (CBM) databases were searched from inception to July 10, 2016. A total of 16 studies were included for meta-analysis. We found that subclinical hypothyroidism was not correlated with coronary heart disease (CHD) (RR = 1.17; 95% CI, 0.91–1.52), total mortality (RR = 1.02; 95% CI, 0.93–1.13), cardiovascular mortality (RR = 1.06; 95% CI, 0.77–1.45), heart failure (RR = 1.17; 95% CI, 0.87–1.57), and atrial fibrillation (RR = 1.05; 95% CI, 0.91–1.21), except CHD mortality (RR = 1.37; 95% CI, 1.03–1.84). Subgroup analysis indicated a higher estimation risk in CHD (RR = 1.54; 95% CI, 1.00–2.39), cardiovascular mortality (RR = 2.14; 95% CI, 1.43–3.22), and CHD mortality (RR = 1.54; 95% CI, 1.11–2.15) among participants < 65 years. Furthermore, subclinical hyperthyroidism was found to be associated with CHD (RR = 1.20; 95% CI, 1.02–1.42), total mortality (RR = 1.27; 95% CI, 1.07–1.51), and CHD mortality (RR = 1.45; 95% CI, 1.12–1.86). Conclusions. Subclinical hypothyroidism is likely associated with an increased risk of CHD mortality, and subclinical hyperthyroidism is likely associated with increased risk of CHD, CHD mortality, and total mortality.
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spelling doaj-art-c69ff3106e1145e0bb343f661146a2d62025-08-20T02:19:16ZengWileyInternational Journal of Endocrinology1687-83371687-83452017-01-01201710.1155/2017/81307968130796Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort StudiesJing Sun0Liang Yao1Yuan Fang2Ruifei Yang3Yaolong Chen4Kehu Yang5Limin Tian6Department of Endocrinology, Gansu Provincial Hospital, Dong Gang West Road, Lanzhou, Gansu 730000, ChinaClinical Evidence-Based Medicine Center, Gansu Provincial Hospital, Dong Gang West Road, Lanzhou, Gansu 730000, ChinaDepartment of Endocrinology, Gansu Provincial Hospital, Dong Gang West Road, Lanzhou, Gansu 730000, ChinaDepartment of Endocrinology, Gansu Provincial Hospital, Dong Gang West Road, Lanzhou, Gansu 730000, ChinaEvidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, ChinaEvidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, ChinaDepartment of Endocrinology, Gansu Provincial Hospital, Dong Gang West Road, Lanzhou, Gansu 730000, ChinaBackground. Evidence on the association between subclinical thyroid dysfunction and the risk of cardiovascular outcomes are conflicting. Methods and Results. PubMed, EMbase, Web of Science, Cochrane Library, and China Biology Medicine (CBM) databases were searched from inception to July 10, 2016. A total of 16 studies were included for meta-analysis. We found that subclinical hypothyroidism was not correlated with coronary heart disease (CHD) (RR = 1.17; 95% CI, 0.91–1.52), total mortality (RR = 1.02; 95% CI, 0.93–1.13), cardiovascular mortality (RR = 1.06; 95% CI, 0.77–1.45), heart failure (RR = 1.17; 95% CI, 0.87–1.57), and atrial fibrillation (RR = 1.05; 95% CI, 0.91–1.21), except CHD mortality (RR = 1.37; 95% CI, 1.03–1.84). Subgroup analysis indicated a higher estimation risk in CHD (RR = 1.54; 95% CI, 1.00–2.39), cardiovascular mortality (RR = 2.14; 95% CI, 1.43–3.22), and CHD mortality (RR = 1.54; 95% CI, 1.11–2.15) among participants < 65 years. Furthermore, subclinical hyperthyroidism was found to be associated with CHD (RR = 1.20; 95% CI, 1.02–1.42), total mortality (RR = 1.27; 95% CI, 1.07–1.51), and CHD mortality (RR = 1.45; 95% CI, 1.12–1.86). Conclusions. Subclinical hypothyroidism is likely associated with an increased risk of CHD mortality, and subclinical hyperthyroidism is likely associated with increased risk of CHD, CHD mortality, and total mortality.http://dx.doi.org/10.1155/2017/8130796
spellingShingle Jing Sun
Liang Yao
Yuan Fang
Ruifei Yang
Yaolong Chen
Kehu Yang
Limin Tian
Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
International Journal of Endocrinology
title Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
title_full Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
title_fullStr Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
title_full_unstemmed Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
title_short Relationship between Subclinical Thyroid Dysfunction and the Risk of Cardiovascular Outcomes: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
title_sort relationship between subclinical thyroid dysfunction and the risk of cardiovascular outcomes a systematic review and meta analysis of prospective cohort studies
url http://dx.doi.org/10.1155/2017/8130796
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