4.5 Article

Sex differences in the association between adipose insulin resistance and non-alcoholic fatty liver disease in Chinese adults

期刊

BIOLOGY OF SEX DIFFERENCES
卷 14, 期 1, 页码 -

出版社

BMC
DOI: 10.1186/s13293-023-00549-0

关键词

Sex; Non-alcoholic fatty liver disease; Adipose tissue; Insulin resistance; Hyperlipidemias; Menopause; Age

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This study found sex differences in the association between adipose insulin resistance (Adipo-IR) and non-alcoholic fatty liver disease (NAFLD), with a stronger correlation in hyperlipidemic women. The association was also stronger in women over 50 years old. Targeting Adipo-IR for treatment may be valuable in alleviating NAFLD, especially in hyperlipidemic women after menopause.
Background: Adipose insulin resistance (Adipo-IR) is associated with multiple metabolic diseases, including non-alcoholic fatty liver disease (NAFLD). The study aimed to evaluate sex differences in the association between Adipo-IR and NAFLD, and further investigated other potential modifiers.Methods: This cross-sectional study enrolled adults without diabetes who underwent physical examinations in Beijing Chao-Yang Hospital. We calculated the Adipo-IR index as the product of the fasting insulin and free fatty acid concentration. We categorized Adipo-IR into four groups according to quartiles, using the first interquartile range (Q1) as the reference. Logistic regression was used stratified by the modifiers after adjustment for potential confounders.Results: There were 5586 participants in the study, 49.8% (n = 2781) of whom were women and 30.4% (n = 1698) with NAFLD. There was a graded positive association between Adipo-IR and NAFLD, with sex (P = 0.01) and hyperlipidemia (P = 0.02) modifying this association. In the hyperlipidemic women, for one unit increase in log-Adipo-IR, the odds of having NAFLD increased by 385% after adjustment for potential confounders (OR = 4.85, 95%CI 3.54-6.73, P < 0.001). However, it turned out that the odds of having NAFLD increased by 131% (OR = 2.31, 95%CI 1.74-3.11, P < 0.001), 216% (OR = 3.16, 95%CI 2.56-3.93, P < 0.001), 181% (OR = 2.81, 95%CI 1.88-4.28, P < 0.001) in normolipidemic men, hyperlipidemic men, and normolipidemic women, respectively. Similarly, the ORs for the association between Adipo-IR and NAFLD in women with age >= 50 years were higher than ORs in women with age < 50 years.Conclusions: The positive correlation between Adipo-IR and NAFLD was stronger in hyperlipidemic women, compared with normolipidemic or hyperlipidemic men, or normolipidemic women. The association also strengthened for women over 50 years. Treatment strategies targeting Adipo-IR to alleviate NAFLD may be of value, especially in hyperlipidemic women after menopause.

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