ERBB2 and breast cancer: In univariate analysis, TSR was not significantly associated with 5-DFS in TNBC (HR = 1.33, 95% CI = 0.98–1.80, P = 0.071), HER2-positive breast cancer (HR = 1.32, 95% CI = 0.95–1.82, P = 0.095), or luminal– HER2-negative breast cancer (HR = 1.30, 95% CI = 0.89–1.91, P = 0.176; Fig. 3A).