When stratified by cancer type, a significant association between the XPG rs2296147T>C polymorphism and PFS of NSCLC patients was found under TT vs. CC genetic model (HR = 0.50, 95% CI, 0.31-0.81, P = 0.005, Figure 3B, Table 3). This evidence concerns the gene ERCC5 and non-small cell lung carcinoma.