GSTM1 and diabetes mellitus: After SBP, serum sodium, Hb, BUN and age were binary-transformed, LVEF was a significant predictor of cardiovascular mortality only in patients with ischemic HF using a Cox model that included a history of HF, age, SBP, serum sodium levels, sex, DM, COPD, CKD, AMI, Af and anemia (hazard ratio (HR) 1.475, 95% confidence interval (CI) 1.099–1.979, p = 0.010) (Table 3).