The mediating role of BMI in alcohol-linked liver enzyme elevation among adults at a tertiary care hospital in South India.

Abstract

Background: Excessive alcohol consumption is a major risk factor for liver disease, with significant variations in its impact across populations. BMI has been identified as a potential mediator in alcohol-related liver damage. This study aimed to examine the association between alcohol consumption and liver function and to explore the mediating role of BMI in a population from India, where both are rising public health concerns.

Materials and methods: A cross-sectional study was conducted using data from adult participants. Liver function was assessed using serum levels of gamma-glutamyl transferase (GGT), alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase (ALP). Alcohol consumption was self-reported, and BMI was calculated AST from height and weight measurements. Multiple linear regression models were used to evaluate the relationship between alcohol consumption and liver enzymes while adjusting for BMI as a mediator. Statistical significance was set at P  < 0.05.

Results: The results indicated that higher alcohol consumption was significantly associated with elevated levels of GGT, ALT, and AST. BMI was found to mediate this relationship, with individuals having higher BMI showing a greater increase in liver enzyme levels in response to alcohol consumption. However, no significant association was observed for ALP. BMI also independently correlated with higher levels of GGT, ALT, and AST.

Conclusion: This study highlights the mediating role of BMI in alcohol-induced liver dysfunction in the Indian population. Public health interventions focusing on both reducing alcohol intake and managing obesity may help mitigate the risk of liver disease in this high-risk population.