GSTM1 and diabetes mellitus: The ORs obtained for diabetes in the lowest or highest decile were as follows: Taiwanese HC men: OR = 1.71 (1.39–2.10, p < 0.0001) at ≤13.5 g/dL and OR = 1.64 (1.33–2.02, p < 0.0001) at ≥16.5 g/dL Hb; Taiwanese HC women: OR = 1.32 (1.12–1.56, p = 0.0010) at ≤11.5 g/dL and OR = 1.83 (1.59–2.10, p < 0.0001) at ≥14.5 g/dL Hb; European Whites men: OR = 2.10 (1.94–2.27, p < 0.0001) at ≤13.79 g/dL Hb; European Whites women: OR = 1.81 (1.63–2.01, p < 0.0001) at ≤12.39 g/dL and OR = 1.39 (1.26–1.54, p < 0.0001) at ≥14.68 g/dL Hb.