However, compared with the DM group, the level of body mass index (BMI) was significantly lower in the GT group (p < 0.05), the level of hemoglobin (Hb) was lower in the DFG and GT groups (p < 0.01), the levels of total cholesterol (TC), low-density lipoprotein (LDL), albumin (Alb) were lower in the DFG, GI and GT groups (p < 0.05). Here, GSTM1 is linked to diabetes mellitus.