MKI67 and metastatic malignant neoplasm in the lymph nodes: For the 3Y DFS, ≥ 55% of the baseline Ki-67 labeling index with luminal type (HR 2.1, 95% CI, 1.04–4.25), and ≥ 4 lymph node metastases at surgery (HR 1.9, 95% CI, 1.07–3.51) seemed to correlate with the 3Y DFS.