Table 2. Univariate and multivariate Cox proportional hazards regression analysis in all patients.

HR, hazard ratio; CI, confidence interval; SLNB, sentinel lymph node biopsy; ALND, axillary lymph node dissection; LN, lymph node; HER2, human epidermal growth factor receptor 2; TNBC, triple-negative breast cancer.

^a)Nottingham histologic score system.