Fig. 3
From: Novel models by machine learning to predict prognosis of breast cancer brain metastases
Validation of XGBoost models from external database. AÂ ROC curve for the 6-month prognostic model (external validation data); B ROC curve for the 1-year prognostic model (external validation data); C ROC curve for the 2-year prognostic model (external validation data); D ROC curve for the 3-year prognostic model (external validation data); ROC receiver operating characteristic curve; AUC area under the curve; XGBoost extreme gradient boosting