T2DM-0 group: type 2 diabetes mellitus patients without coronary heart disease; T2DM-CHD group: type 2 diabetes mellitus patients with coronary heart disease; HA: Hypertension; BMI: body-mass index; FPG: fasting plasma glucose; HbA1c: glycated hemoglobin A1c; TC: total cholesterol; TG: triglyceride; HDL-C: high-density lipoprotein cholesterol; LDL-C: low–density lipoprotein cholesterol; ALT: alanine aminotransferase; AST: aspartate aminotransferase; BUN: blood urea nitrogen; SCr: serum creatinine. Here, GPT is linked to type 2 diabetes mellitus.