Quantitative assessment of the association between XPG Asp1104His polymorphism and bladder cancer risk.

Published data regarding the association between XPG Asp1104His polymorphism and bladder cancer risk remained controversial. This meta-analysis of literatures was performed to draw a more precise estimation of the relationship. We systematically searched PubMed, Embase, and Web of Science with a time limit of June 22, 2013. Summary odds ratios (ORs) with 95 % CIs were used to assess the strength of the association between XPG Asp1104His polymorphism and bladder cancer risk using random effects model. A total of eight case-control studies including 2,613 cases and 2,934 controls were included for analysis. Overall, no significant association was found between XPG Asp1104His polymorphism and bladder cancer susceptibility for CC vs. GG (OR = 1.12, 95 % CI = 0.74-1.69), GC vs. GG (OR = 1.12, 95 % CI = 0.86-1.46), the dominant model CC + GC vs. GG (OR = 1.08, 95 % CI = 0.85-1.38), and the recessive model CC vs. GC + GG (OR = 0.92, 95 % CI = 0.66-1.29). In the subgroup analysis, no significant associations were found in either Asian or non-Asian population. This meta-analysis suggested that XPG Asp1104His polymorphism was not associated with bladder cancer risk.