GSTM1 and anemia: (Table 3) The crude and adjusted Cox regression hazard ratio of follow-up death stratified by Hb status (Table 4) revealed that moderate anemia is independently associated with 1-year mortality in both genders (Adjusted Hazard Ratio [HR] 1.793; 95% CI 1.308–2.458; P-value < 0.001 and adjusted HR 1.790; 95% CI 1.312–2.442; P-value < 0.001 in male and female, respectively).