Univariate logistic regression analysis showed that age, BMI, DBP, duration of T2DM, CHD, HBP, BUN, Scr, TC, TG, HDL-C, LDL-C, AST, ALB, and Hb were significantly different risk factors in the training set (P<0.05, Table 2). This evidence concerns the gene GSTM1 and type 2 diabetes mellitus.