The Journal of clinical endocrinology and metabolism · 2025
Associations Between Subclinical Thyroid Dysfunction and Cardiovascular Risk Factors According to Age and Sex.
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Baretella Oliver, Blum Manuel R, Abolhassani Nazanin, Alwan Heba, Wildisen Lea, Del Giovane Cinzia, Tal Kali, Moutzouri Elisavet, Åsvold Bjørn O, Cappola Anne R, Gussekloo Jacobijn, Iacoviello Massimo, Iervasi Giorgio, Imaizumi Misa, Weiler Stefan, Razvi Salman, Sgarbi José A, Völzke Henry, Brown Suzanne J, Walsh John P, Vaes Bert, Yeap Bu B, Dullaart Robin P F, Bakker Stephan J L, Kavousi Maryam, Ceresini Graziano, Ferrucci Luigi, Aujesky Drahomir, Peeters Robin P, Bauer Douglas C, Feller Martin, Rodondi Nicolas
Аннотация
CONTEXT: Subclinical thyroid dysfunction (ScTD), comprising subclinical hypothyroidism (SHypo) and subclinical hyperthyroidism (SHyper), has been associated with increased risk for cardiovascular events.
OBJECTIVE: To assess associations between ScTD and cardiovascular risk factors (cvRFs) according to age and sex.
METHODS: This analysis of pooled participant data from large prospective cohort studies from the Thyroid Studies Collaboration assessed cvRFs (blood pressure [BP], lipid levels, high-sensitivity C-reactive protein [hs-CRP]) among participants aged 18 to 103 years with SHypo (thyroid-stimulating hormone [TSH] > 4.50 mU/L, normal fT4) and SHyper (TSH < 0.45 mU/L, normal fT4) vs euthyroid (TSH 0.45-4.50 mU/L).
RESULTS: Of 69 006 participants (mean age 62 years, 55% women, 25% current smokers) from 16 international cohorts, 3748 (5.4%) had SHypo and 3428 (5.0%) had SHyper. In both women and men, systolic and diastolic BP were similar regardless of thyroid status. Exceptions were lower diastolic BP in women with SHyper compared to euthyroid participants (adjusted mean difference [aMD] -1.3 mmHg, 95% CI -2.0 to -0.5), and lower systolic BP in men with SHyper compared to euthyroid participants (aMD -3.1 mmHg, 95% CI -4.8 to -1.4). In both women and men, lipid levels (total, HDL, LDL-cholesterol, triglycerides) and hs-CRP were similar regardless of thyroid status. The only exception were women with SHyper who had lower LDL-cholesterol vs euthyroid (aMD -0.17 mmol/L, 95% CI -0.29 to -0.05).
CONCLUSION: Participants with ScTD and euthyroid participants have similar cvRFs and differences are arguably too small to explain the increased cardiovascular risk in ScTD observed in previous studies.
OBJECTIVE: To assess associations between ScTD and cardiovascular risk factors (cvRFs) according to age and sex.
METHODS: This analysis of pooled participant data from large prospective cohort studies from the Thyroid Studies Collaboration assessed cvRFs (blood pressure [BP], lipid levels, high-sensitivity C-reactive protein [hs-CRP]) among participants aged 18 to 103 years with SHypo (thyroid-stimulating hormone [TSH] > 4.50 mU/L, normal fT4) and SHyper (TSH < 0.45 mU/L, normal fT4) vs euthyroid (TSH 0.45-4.50 mU/L).
RESULTS: Of 69 006 participants (mean age 62 years, 55% women, 25% current smokers) from 16 international cohorts, 3748 (5.4%) had SHypo and 3428 (5.0%) had SHyper. In both women and men, systolic and diastolic BP were similar regardless of thyroid status. Exceptions were lower diastolic BP in women with SHyper compared to euthyroid participants (adjusted mean difference [aMD] -1.3 mmHg, 95% CI -2.0 to -0.5), and lower systolic BP in men with SHyper compared to euthyroid participants (aMD -3.1 mmHg, 95% CI -4.8 to -1.4). In both women and men, lipid levels (total, HDL, LDL-cholesterol, triglycerides) and hs-CRP were similar regardless of thyroid status. The only exception were women with SHyper who had lower LDL-cholesterol vs euthyroid (aMD -0.17 mmol/L, 95% CI -0.29 to -0.05).
CONCLUSION: Participants with ScTD and euthyroid participants have similar cvRFs and differences are arguably too small to explain the increased cardiovascular risk in ScTD observed in previous studies.