GSTP1 and leukemia: From the set of all considered predictors, only GSTP1 Ile105Val polymorphism can be considered an independent predictor or an independent risk factor for leukemia (p < 0.0001) while GPX1 Pro198Leu and patient gender had a positive effect on the risk of leukemia but only with a tendency towards statistical significance (p = 0.09; p = 0.08, resp).