Summary of meta-analysis of GSTM1, GSTT1 and GSTP1 polymorphisms and PCa risk.

OR, odds ratio; CI, confidence interval.*GSTP1 the total result of after excluding three researches deviated from Hardy-Weinberg equilibrium (HWE).aGSTM1 (−/−) and GSTT1 (−/−) vs. GSTM1 (+/−) and GSTT1 (−/−) with GSTM1 (−/−) and GSTT1 (+/−).bGSTT1 (−/−) and GSTP1 (AG+GG) vs. GSTT1 (+/−) and GSTP1 (AA) with GSTT1 (−/−) and GSTP1 (AG+GG).cGSTM1 (−/−) and GSTP1 (AG+GG) vs. GSTM1 (+/−) and GSTP1 (AA) with GSTM1 (−/−) and GSTP1 (AG+GG).dGSTM1 (−/−), GSTT1 (−/−) and GSTP1 (AG+GG) vs. the other combinations of the GSTM1, GSTT1 and GSTP1 polymorphisms.