Patient characteristics
LYMPH NODE METASTASIS, PROLIFERATION
A flowchart of the study is shown in Clinicopathologic characteristics of patients in the entire, training, and validation sets*Fisher’s precision probability test TNM: Tumor-node-metastasis; ER: Estrogen receptor; PR: Progesterone receptor; HER2: Human epidermal growth factor receptor 2; Ki67: Proliferation marker protein Ki67.Clinical characteristics of patients with or without axillary lymph node metastasis across entire, training, and validation sets*Fisher’s precision probability test TNM: Tumor-node-metastasis; ER: Estrogen receptor; PR: Progesterone receptor; HER2: Human epidermal growth factor receptor 2; Ki67: Proliferation marker protein Ki67.