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External validation ROC curves for short-term outcomes. (a) Mechanical ventilation; (b) 30-day mortality; (c) 3-month mortality. Final models are highlighted, with AUC reported in the legend.
ROC, receiver operating characteristic; AUC, area under the curve; XGBoost, extreme gradient boosting; LASSO, least absolute shrinkage and selection operator; SVM, support vector machine; RBF, radial basis function.
