Figure 2

Forest plots describing the association of GSTM1 and GSTT1 wild-type genotype with RCC risk.
(A) The association of GSTM1 wild-type genotype with RCC risk. (B) The association of GSTT1 wild-type genotype with RCC risk. (C) The association of combination of GSTM1 and GSTT1 polymorphism with RCC. OR: odds ratio; CI: confidence interval; I2, measure to quantify the degree of heterogeneity in meta-analysis.