GPT and type 2 diabetes mellitus: We found that male, age, BMI, WC, ALT, AST, GGT, TC, TG, HbA1c, FPG, SBP, DBP, fatty liver, smoking status (past or current) and alcohol consumption (heavy) (P < 0.05) were positively correlated with the risk of T2DM, and that HDL (P < 0.0001) was negatively correlated with the risk of T2DM.