GSTM1 and hypertensive disorder: There were significant differences between the two groups in age (p < 0.001), sex (p < 0.001), education (p < 0.001), hypertension (p = 0.016), smoking (p < 0.001), drinking (p = 0.025), RBC (p = 0.001), Hb (p < 0.001), TC (p = 0.025) and PLR (p = 0.002).