RXRG and breast cancer: The Cox regression model demonstrated that RXRG was an independent predictor of both breast cancer-specific survival and longer distant metastasis-free interval (HR = 0.5; 95% CI = 0.4–0.7; p = 0.004 and HR = 0.7; 95% CI = 0.5–0.9; p = 0.036, respectively, Table 4).