GSTP1 and colorectal cancer: Even though no significant associations were found in the “PB” or “HB” subgroup analyses (Supplementary Table S4, all P-association > 0.05), there was a positive association between GSTP1 rs1138272 and the risk of colorectal cancer in the Caucasian population for the models of TT vs. CC (Supplementary Table S5, P-association = 0.52, OR = 1.21) and TT vs. CC+CT (P-association = 0.023, OR = 0.52).