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U-shaped associations between body mass index and serum liver enzyme levels

Liver enzymes are associated with liver function, but their relationship with body mass index (BMI) remains unclear. This cross-sectional study aimed to identify correlations between serum liver enzyme levels and BMI in the general population. The data were derived from the Dryad Digital Repository....

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Published in:Scientific reports 2025-01, Vol.15 (1), p.443-8, Article 443
Main Authors: Huang, Zixi, Liu, Hualong, Zhuo, Wen, Chen, Yuliang, Huang, Ying, Chen, Xin, Lu, Teng, Xu, Zhenyan
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Liu, Hualong
Zhuo, Wen
Chen, Yuliang
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Chen, Xin
Lu, Teng
Xu, Zhenyan
description Liver enzymes are associated with liver function, but their relationship with body mass index (BMI) remains unclear. This cross-sectional study aimed to identify correlations between serum liver enzyme levels and BMI in the general population. The data were derived from the Dryad Digital Repository. Smooth curve and multiple linear regression analyses were performed to evaluate the associations between BMI and serum liver enzyme levels. A total of 15,464 participants, including 8430 males (54.5%), were included in the study, with a median age of 43.7 years. Smooth curve regression revealed that BMI followed U-shaped curves with respect to serum levels of liver enzymes (AST, ALT, and GGT). For AST serum levels, the turning points were BMI = 19.0 and 23.3 kg/m 2 ; for ALT serum levels, the inflection points were BMI = 19.0 and 23.1 kg/m 2 ; and for GGT serum levels, the inflection point was BMI = 19.5 kg/m 2 . In addition, stratified analysis revealed that sex, fatty liver, and smoking status as covariates modified the associations between BMI and AST and ALT serum levels in participants with higher BMIs (all interactions P  
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subjects 692/499
692/699/1503/1607
692/699/2743/393
Adult
Alanine Transaminase - blood
Aspartate Aminotransferases - blood
Associations
Body Mass Index
Cross-Sectional Studies
Enzymes
Fatty liver
Female
gamma-Glutamyltransferase - blood
Humanities and Social Sciences
Humans
Liver
Liver - enzymology
Liver diseases
Liver enzymes
Male
Middle Aged
multidisciplinary
Population studies
Science
Science (multidisciplinary)
Serum levels
Smoking
title U-shaped associations between body mass index and serum liver enzyme levels
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