4.6 Article

Gender differences in non-alcoholic fatty liver disease in obese children and adolescents: a large cross-sectional study

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HEPATOLOGY INTERNATIONAL
卷 -, 期 -, 页码 -

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SPRINGER
DOI: 10.1007/s12072-023-10596-9

关键词

NAFLD; Obesity; Gender differences; Sex hormones; Testosterone; Estradiol; Luteinizing hormone; Prolactin; Puberty; Fat distribution

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This study examines the prevalence of non-alcoholic fatty liver disease (NAFLD) in obese Chinese children and investigates the relationship between sex hormones and NAFLD. The study finds a significant difference in NAFLD prevalence between genders in obese children, which is influenced by age, Tanner stage, and fat distribution. Sex hormones are associated with NAFLD prevalence in a gender-specific manner.
Objective Previous studies have reported sex differences in non-alcoholic fatty liver disease (NAFLD) among adults; however, little is known about its occurrence in children and adolescents. This study aims to examine the prevalence of NAFLD among them and investigate the relationship between sex hormones and NAFLD.Method This study included 2999 obese Chinese children aged 2-18 years. We examined the prevalence of NAFLD by sex, age, and Tanner stage. The regression model and principal component analysis were used to analyze the relationship between sex hormones and NAFLD.Results The prevalence of NAFLD increased with age in both sexes, and the gender difference appeared before puberty. The prevalence in boys tended to stabilize at the age of 11 years, whereas girls reached their peak temporarily. NAFLD prevalence was positively associated with estradiol in boys (p = 0.011), but the opposite trend was observed in girls (p = 0.031). Testosterone levels decreased with the increase of NAFLD prevalence in boys (p < 0.001). Luteinizing hormone and prolactin were inversely associated with NAFLD prevalence in boys and girls, respectively. Results from the principal component analysis showed that sex hormone levels and fat distribution were important risk factors for the prevalence of NAFLD in obese children (p < 0.001).Conclusion The significant difference in NAFLD prevalence between genders in obese children begins in early childhood. This distinction emerges long before puberty onset and tends to stabilize during late adolescence. Sex hormones are associated with NAFLD prevalence and are influenced by the Tanner stages and fat distribution.

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