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The European System for Cardiac Operative Risk Evaluation II (EuroSCORE II) has been recently developed to improve the performance of the original EuroSCORE. Herein we evaluated its discriminatory ability in predicting the immediate and late outcome after coronary artery bypass grafting (CABG).

Complete data on 1,027 patients who underwent isolated CABG were available for validation of EuroSCORE II and to compare its discriminatory ability with the original EuroSCORE and its Finnish modified version.

EuroSCORE II performed somewhat better (area under the curve [AUC] 0.852, Brier score 0.031) than the original logistic EuroSCORE (AUC 0.838, Brier score 0.034) and its Finnish modified version (AUC 0.825, Brier score 0.034) in predicting operative mortality. The overall expected-to-observed operative mortality ratio for the original logistic EuroSCORE was 1.8 …