Validation of selected models for prediction of survival of patients with de novo metastatic breast cancer.

aPatients with brain metastases excluded.bPatients with equivocal Her2 status were excluded.cExclusively patients with brain metastasis.dC-statistic for complete case analysis based on 297 patients was 0.63 (95% CI, 0.59–0.67).a. 排除脑转移瘤（brain metastases）患者。 b. 排除人表皮生长因子受体2（Her2）状态不明的患者。 c. 仅纳入脑转移瘤患者。 d. 基于297例患者的完整病例分析所得的C统计量（c-statistic）为0.63（95%置信区间：0.59–0.67）。