ROC curves of scoring systems for predicting organ failure in AP. The ROC curves show the AUC for the EPIC, Balthazar, BISAP, and SIRS scoring systems. AP = acute pancreatitis, BISAP = bedside index of severity in acute pancreatitis, EPIC = extrapancreatic inflammation on computed tomography, ROC = receiver operator characteristic, SIRS = systemic inflammatory response syndrome.