GSTM1 and metabolic syndrome: In postmenopausal women, age (P < 0.001), DBP (P = 0.033), BMI (P = 0.010), WM (P = 0.001), TGs (P < 0.001), HDL-C (P < 0.001), FBG (P < 0.001), insulin (P = 0.001), MetS (P < 0.001), MetS score (P < 0.001), Hb (P < 0.001), Hct (P < 0.001), and HOMA-IR (P < 0.001) were associated with the quartiles of ferritin but SBP (P = 0.557), TC (P = 0.852), and HOMA-B (P = 0.602) were not (Table 3).