GSTM1 and Hypertension: The patient age, sex, BMI, SBP, DBP, smoking status, hypertension grade, glycaemia, Hb, HbA1c, HDL-C, LDL-C, TC, TG, uric acid, insulin use, and oral hypoglycaemic drug use were differed between the three groups (all P < 0.05, Table 1).