GSTP1 and cancer: For the overall analysis, significant association between the risk of cancer and the variant genotypes of GSTP1 341C>T polymorphism was found in homozygote comparison (TT versus CC: P = 0.012, OR = 1.40, 95% CI: 1.08–1.81, Phet. = 0.575), and recessive model (TT versus CT/CC: P = 0.012, OR = 1.40, 95% CI: 1.08–1.81, Phet. = 0.562).