Abstract
This study was performed to ascertain whether a relationship exists between thyroid function and blood pressure in school-aged Chinese subjects without overt thyroid disease. A cross-sectional survey of 880 subjects (541 females and 339 males) aged 7–18 years in Bengbu, Anhui province was conducted. The investigation, which was based on a stratified random cluster sampling method, included a questionnaire and measurements of blood pressure, height, and body weight. Fasting blood samples were taken for measurements of thyroid-stimulating hormone (TSH), free 3,5,3′-triiodothyronine (FT3) and free thyroxine (FT4). Serum TSH and FT3 were positively correlated with systolic and diastolic blood pressure Z scores (SBP-Z and DBP-Z) even after adjusting for body mass index (BMI) (P < 0.05) but no correlation was observed between FT4 and SBP-Z or DBP-Z after comparable adjustments (P > 0.05). SBP-Z and DBP-Z in subjects with subclinical hypothyroidism were significant higher than in euthyroid subjects (P < 0.05). Both SBP-Z and DBP-Z increased linearly with TSH concentration in boys after adjusting BMI (P < 0.05); however, a similar linear trend was not observed in girls. Our findings support the hypothesis that elevated TSH and FT3 concentrations increase blood pressure in school-aged Chinese subjects without overt thyroid disease; this increase may be even more significant in boys.
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Acknowledgments
This work was supported by a Medical Key Subject grant from Jiangsu Province, China. Chao Liu was supported by grants RC2002047 and LJ200619 from Jiangsu Province, China. We are grateful to all patients and medical staff who participated in the study.
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Chen, H., Xi, Q., Zhang, H. et al. Investigation of thyroid function and blood pressure in school-aged subjects without overt thyroid disease. Endocrine 41, 122–129 (2012). https://doi.org/10.1007/s12020-011-9517-7
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DOI: https://doi.org/10.1007/s12020-011-9517-7