4.7 Article

Subclinical and Overt Thyroid Dysfunction and Risk of All-Cause Mortality and Cardiovascular Events: A Large Population Study

期刊

JOURNAL OF CLINICAL ENDOCRINOLOGY & METABOLISM
卷 99, 期 7, 页码 2372-2382

出版社

ENDOCRINE SOC
DOI: 10.1210/jc.2013-4184

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资金

  1. Danish Heart Foundation [11-04-R84-A3483-22669]
  2. Danish Thyroid Association
  3. Agnes and Knut Mork Foundation
  4. FUKAP Foundation
  5. START Foundation
  6. Gentofte University Hospital, Hellerup, Denmark
  7. Novo Nordisk Foundation

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Context: Thyroid dysfunction has been associated with both increased all-cause and cardiovascular mortality, but limited data are available on mild thyroid dysfunction and cause-specific mortality. Objective: The objective of the study was to examine the risk of all-cause mortality, major adverse cardiovascular events (MACEs), and cause-specific events in subjects with overt and subclinical thyroid dysfunction. Design: This was a retrospective cohort study. Setting and Participants: Participants in the study were subjects who underwent thyroid blood tests, without prior thyroid disease, consulting their general practitioner in 2000-2009 in Copenhagen, Denmark. Main Outcome Measure: All-cause mortality, MACEs, and cause-specific events identified in nationwide registries were measured. Results: A total of 47 327 (8.4%) deaths occurred among 563 700 included subjects [mean age 48.6 (SD +/- 18.2) y; 39% males]. All-cause mortality was increased in overt and subclinical hyperthyroidism [age adjusted incidence rates of 16 and 15 per 1000 person-years, respectively; incidence rate ratios (IRRs) 1.25 [95% confidence interval (CI) 1.15-1.36] and 1.23 (95% CI 1.16-1.30)] compared with euthyroid (incidence rate of 12 per 1000 person-years). Risk of MACEs was elevated in overt and subclinical hyperthyroidism [IRRs 1.16 (95% CI 1.05-1.27) and 1.09 (95% CI 1.02-1.16)] driven by heart failure [IRRs 1.14 (95% CI 0.99-1.32) and 1.20 (95% CI 1.10-1.31)]. A reduction of all-cause mortality was observed in subclinical hypothyroidism with TSH of 5-10 mIU/L [IRR 0.92 (95% CI 0.86-0.98)]. Conclusions: Heart failure is the leading cause of an increased cardiovascular mortality in both overt and subclinical hyperthyroidism. Subclinical hypothyroidism with TSH 5-10 mIU/L might be associated with a lower risk of all-cause mortality.

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