GPT and major depressive disorder: There were no significant differences in age, sex, height, BMI, TC, TG, HDL, LDL, AST, CK, CK-MB, SCr, FBG, HbA1c and HsCRP among MDD, BD and SCZ (p > 0.05); And there were significant differences in body weight, BMI, LDH, urea, UA, ALT(U/L) and Hcy (p < 0.05).