CRP and alkaline phosphatase measurement: A retrospective analysis carried out on 108 patients with acute biliary pancreatitis showed the BISAP score (AUC 0.91), CRP levels at 48 hours (AUC 0.92), MCTSI (AUC 0.94), and CTSI (AUC 0.93) had the highest AUC for predicting the severity of AP (35).