On the contrary, high SIX3 level was found to be associated with better OS (HR: 0.44, 95% CI: 0.20–0.96; P = 0.593 and I2 = 0.0%; Fig. 7E) and RFS (HR: 0.49, 95% CI: 0.32–0.76; P = 0.451 and I2 = 0.0%; Fig. 7F) of basal-like breast cancer patients. Here, SIX3 is linked to breast cancer.