OGG1 and lung cancer: When stratifying this meta-analysis by control sources, we also found a significant difference between hOGG1 Ser326Cys genotype and lung cancer susceptibility in studies with hospital-based controls for homozygote model (OR = 0.798; 95% CI = 0.649–0.982; Pheterogeneity = 0.007; P = 0.033), dominant model (OR = 0.122; 95% CI = 0.091–0.163; Pheterogeneity = 0.000; P = 0.000), and recessive model (OR = 0.670; 95% CI = 0.455–0.986; Pheterogeneity = 0.000; P = 0.042) (Table 2).