Summary of meta-analysis of <i>GSTM1, GSTT1</i> and <i>GSTP1</i> 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.