INS and type 2 diabetes mellitus: The general data of subjects in control group and intervention group included age, gender, history of smoking and alcohol consumption, combined DR, duration of T2DM, BMI, WHR, FPG, PPG, HbA1c, islet function grading, TC, TG, LDL-c, HDL-c, SBP, DBP, surgery level, and dosage of insulin.