BISAP Versus Ranson's scores in predicting the severity of acute pancreatitis.

Objective: To determine the diagnostic accuracies of BISAP and RANSON’s scores in predicting the severity of acute pancreatitis, taking the Revised Atlanta classification as a gold standard. Study Design: Cross-sectional Study Validation study. Setting: Department of Emergency and ICU, Mayo Hospital, Multan. Period: May 20th, 2025, to November 19th, 2025. Methods: This research included 200 acute pancreatitis (AP) patients of either gender. After informed consent and patient characteristics, all patients received laboratory tests, chest X-ray, USG abdomen, and CT scan to diagnose acute pancreatitis and compute BISAP and RANSON scores. The Revised Atlanta Classification (RAC) determined the AP severity. Severe AP patients with Atlanta, BISAP, and RANSON scores >3 were labeled as True Positive. The diagnostic accuracy of both criteria was determined using a 2x2 table. Results: The mean age of the study population was 44.3±15.9 years, comprising 60% females. Biliary etiology was the cause of AP in 72.5% of patients. According to the RAC, 64 patients (32%) had severe AP. Compared to the BISAP criteria, RANSON correctly identified actual positive cases (96.9% vs 68.8%). The overall diagnostic accuracy of the RANSON criteria was better than the BISAP criteria (95% vs 85%). Conclusion: The diagnostic accuracy of the RANSON criteria surpassed that of the BISAP score in forecasting the severity of acute pancreatitis, using the Revised Atlanta classification as the gold standard.