In the histological type subgroup analysis with more details, the OGG1 Ser326Cys allele was significantly associated with risk of ADC (Ser/Ser vs. Cys/Cys: OR = 1.32, 95% CI = 1.12–1.56; Ser/Cys vs. Cys/Cys: OR = 1.19, 95% CI = 1.04–1.37) and recessive model (OR = 1.23, 95% CI = 1.08–1.40), but not with cancers of the SCC, SCLC and LCC (Table 3, Figure 2). Here, OGG1 is linked to cancer.