GSTM1 and hypertensive disorder: The covariables were also assigned including the different groups of ΔRDW (improved RDW = 1, stable RDW =2, and worsened RDW =3), hypertension history (Yes = 1, No = 0), diabetes mellitus (Yes = 1, No = 0), alcohol consumption history (Yes = 1, No = 0), smoking history (Yes = 1, No = 0), gender (Make = 1, Female = 0), age, TC, TG, Hb, PLT, UA, BUN, LDL-C, HDL-C, RDW1 (basal RDW value), and GRACE score.