Fig. 4
Validation of the model’s predictive performance for estimating the risk of POAF. The AUCs were 0.908 (A) for the derivation cohort and 0.865 (B) for the external validation cohort. Calibration curves showed good agreement between predicted and observed outcomes in both the derivation (C) and external validation (D) cohorts. Decision curve analysis indicated that the nomogram conferred greater net benefit than the “All or None” strategy across a range of threshold probabilities in both the derivation (E) and external validation (F) cohorts. Abbreviations: POAF, postoperative atrial fibrillation; AUC, area under the curve.
