GSTM1 and acute myeloid leukemia: There were no significant differences between variant genotype and AML risk for CAT C262T (Chi-square test, χ2 = 0.03, df = 2, and p = 0.985), MnSOD2 (Chi-square test, χ2 = 4.022, df = 2, and p = 0.134), GSTM1 (Chi-square test, χ2 = 0.026, df = 1, and p = 0.873), and GSTT1 (Chi-square test, χ2 = 0.339, df = 1, and p = 0.560) polymorphisms.