GSTM1 and diabetes mellitus: Among the four RC quartiles, differences with statistical significance were observed in age, gender, race, education level, marital status, FIPR, BMI, WC, smoking, diabetes, hypertension, hyperlipidemia, CVD, CKD, WBC, Neu, Lym, PLT, Hb, ALT, ALP, GGT, Scr, UA, TC, TG, LDL-C, HDL-C, FPG, HbA1c, iron, sodium, and calcium (all P<0.05).