OGG1 and breast cancer: All observed OGG1 mutations were found significantly correlated with tumor types (r = −0.333∗∗∗; p < 0.0001), ER status (r = 0.739∗∗; p < 0.001), and PR status (r = −0.155∗; p < 0.01) of breast cancer patients but a nonsignificant correlation was observed between all mutations and HER-2/neu status (r = 0.318, p = 0.12) of breast cancer patients (Table 4).