The journals of gerontology. Series A, Biological sciences and medical sciences · 2022
High-Normal Thyroid Function Predicts Incident Nonalcoholic Fatty Liver Disease Among Middle-Aged and Older Euthyroid Subjects.
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Gu Yeqing, Wu Xiaohui, Zhang Qing, Liu Li, Meng Ge, Wu Hongmei, Zhang Shunming, Wang Yawen, Zhang Tingjing, Wang Xuena, Sun Shaomei, Wang Xing, Zhou Ming, Jia Qiyu, Song Kun, Niu Kaijun
Аннотация
BACKGROUND: Thyroid hormones (THs) influence hepatic lipid homeostasis through multiple pathways, suggesting that THs may predict the risk of nonalcoholic fatty liver disease (NAFLD). However, prospective studies on the association between THs levels and incident NAFLD in euthyroid subjects are limited. This prospective cohort study aimed to explore whether THs were associated with the development of NAFLD in middle-aged and older euthyroid subjects.
METHOD: A total of 6462 subjects without baseline NAFLD were included in the cohort study (~6-year follow-up period, median: 4.2 years). Chemiluminescence immunoassay was used to measure serum free triiodothyronine (FT3), free thyroxine (FT4), and thyroid-stimulating hormone (TSH), and NAFLD was diagnosed by abdominal ultrasonography. Multivariable Cox proportional hazards regression models were used to assess the association between baseline THs, TSH, and the risk of NAFLD.
RESULTS: During the follow-up period, 1675 subjects developed NAFLD. The incidence rate of NAFLD was 85.0 per 1000 person-years. Compared with the lowest FT3, FT4, and TSH quartiles, the multivariable-adjusted hazard ratios (95% confidence interval) of incident NAFLD for highest quartiles were 1.30 (1.12, 1.51), 1.07 (0.93, 1.23), and 0.82 (0.71, 0.95) (p < .001, p = .56, p = .01, respectively).
CONCLUSIONS: In middle-aged and older euthyroid subjects, high-normal FT3 and low-normal TSH are independently associated with a higher incidence of NAFLD.
METHOD: A total of 6462 subjects without baseline NAFLD were included in the cohort study (~6-year follow-up period, median: 4.2 years). Chemiluminescence immunoassay was used to measure serum free triiodothyronine (FT3), free thyroxine (FT4), and thyroid-stimulating hormone (TSH), and NAFLD was diagnosed by abdominal ultrasonography. Multivariable Cox proportional hazards regression models were used to assess the association between baseline THs, TSH, and the risk of NAFLD.
RESULTS: During the follow-up period, 1675 subjects developed NAFLD. The incidence rate of NAFLD was 85.0 per 1000 person-years. Compared with the lowest FT3, FT4, and TSH quartiles, the multivariable-adjusted hazard ratios (95% confidence interval) of incident NAFLD for highest quartiles were 1.30 (1.12, 1.51), 1.07 (0.93, 1.23), and 0.82 (0.71, 0.95) (p < .001, p = .56, p = .01, respectively).
CONCLUSIONS: In middle-aged and older euthyroid subjects, high-normal FT3 and low-normal TSH are independently associated with a higher incidence of NAFLD.