GPT and diabetes mellitus: Table 1 shows the baseline characteristics of the study population stratified by blood glucose. Compared with the non-diabetes control, the T2D group presented higher age, BMI, blood pressure, and worse serum lipid profile (higher TC, TG and LDL-C and lower HDL-C). The ALT, AST, and GGT levels in the T2D group were significantly higher than those in the non-diabetes group (P < 0.001).