Cox proportional hazards regression analyses also showed that overexpression of BCAP31 was an independent prognostic predictor for both OS (hazard ratio [HR] = 0.2026, p = 0.0053) and DFS (HR = 0.5170, p = 0.0370; Supplementary Table S1) in 186 breast cancer patients (Supplementary Table S1). This evidence concerns the gene BCAP31 and breast cancer.