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Receiver-operating characteristic curve and area under the curve for SYNTAX score I and HATCH score for predicting postoperative atrial fibrillation. HATCH score: cutoff: 2, AUC: 0.656, p < 0.001, 69.4% sensitivity and 56.8% specificity; SYNTAX score: cutoff: 19.7, AUC: 0.647, p < 0.001, 72.2% sensitivity and 66.4% specificity.
