GPT and diabetes mellitus: In the fully-adjusted model (Model II), after adjusting for gender, age, DBP, SBP, BMI, HDL-C, TG, LDL-C, TC, Scr, FPG, BUN, drinking status, smoking status and family history of diabetes, AST/ALT ratio was still negatively correlated with prediabetes risk (HR:0.79, 95%CI: 0.75-0.84 P<0.0001).