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KMID : 1141320190340020117
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Kosin Medical Journal
2019 Volume.34 No. 2 p.117 ~ p.125
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Obese Subjects with Non-Alcoholic Fatty Liver Disease Have a Higher Risk of Thyroid Dysfunction
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Kim Min-Young
Kim Soo-Kyoung
Jung Jae-Hoon
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Abstract
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Objectives: The effects of obesity on thyroid function have not been well established. The aim of this study was to inves-tigate the effects of body mass index (BMI) and/or non-alcoholic fatty liver disease (NAFLD) on thyroid function.
Methods: A retrospective longitudinal analysis was conducted among subjects who underwent comprehensive health check-ups at least four times between 2008 and 2017. Thyroid function was investigated according to BMI or presence of NAFLD at the end of follow-up. The subjects were divided into four groups: control (n = 216), subjects with obese (n = 94), subjects with NAFLD (n = 48), and subjects with obese + NAFLD (n = 93). Obesity was defined as BMI ≥ 25 kg/m2.
Results: During the mean follow-up of 6.8 years (6.8 ± 1.2 years), 42 of the 451 subjects (9.3%) had subclinical hypothy-roidism (SCH) but no subjects developed overt hypothyroidism. In multivariate Cox proportional hazard analysis, after adjustment for age, sex, smoking, and baseline thyroid stimulating hormone level, obese subjects with NAFLD had a higher risk of SCH than the control group.
Conclusions: The obese subjects with NAFLD had a higher risk for SCH in the future.
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KEYWORD
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Body mass index, Hypothyroidism, Non-alcoholic fatty liver disease
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