Receiver Operating Characteristic (ROC) Curves for Readmission Prediction by Comorbidities.

AUC values are shown for individual comorbidities that remained independently significant in the multivariable Fine-Gray models, as well as for their incremental combinations. For 30-day readmission (Figure a), the maximal AUC achieved was 0.555, combining the four significant comorbidities: CKD, COPD, DM, anemia. For 100-day readmission (Figure b), the maximal AUC achieved was 0.593, combining the six significant comorbidities: CKD, DM, anemia, ischemic heart disease, peripheral vascular disease, and COPD.