GPT and Cirrhosis: Using the AST/ALT ratio as a criterion for the severity of liver damage or cirrhosis [23] in HCV antibody-positive patients, the proportion of men (Fisher's exact test, P = 0.024) and BMI of these patients (Wilcoxon rank-sum test, P = 0.003) were significantly higher in the AST/ALT <1 group (61% male, and 24±3 BMI) than in the AST/ALT ≥1 group (39% male, and 23±3 BMI).