iarjsIARJSIARJS2789-610210.47310/iarjs.2024.v04i02.011Comparison Study between Modified Atlanta Score and CT Severity Index Scoring for Prognosis of Acute Gall Stone Induced PancreatitisAkashdeepSinghSanjeevKumarGuptaJunior Resident Department Of General Surgery Indira Gandhi Medical College, Shimla (H.P)Professor, Department Of General Surgery Indira Gandhi Medical College, Shimla (H.P)Background: Acute gallstone-induced pancreatitis is a frequent and potentially severe condition that requires prompt and accurate severity assessment for effective management. The Modified Atlanta Score (MAS), based on clinical and biochemical parameters, offers a rapid, bedside alternative for prognostication. This study aims to compare the effectiveness of MAS with MDCTSI in assessing the severity of acute pancreatitis. Materials and Methods: This prospective study was conducted at the Department of General Surgery, Indira Gandhi Medical College, Shimla, involving 110 patients with acute gallstone-induced pancreatitis. Diagnosis was confirmed through clinical history, biochemical markers, and imaging findings. Patients were classified into mild, moderate, and severe categories using MAS at admission and reassessed at 48 hours. MDCTSI, considered the gold standard, was calculated 72 hours after admission. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of MAS were evaluated against MDCTSI for each severity category. Results: MAS was effective in identifying patients with severe disease, showing high sensitivity (98.63%) for mild cases, 100% specificity for moderate cases, and both high sensitivity (92.86%) and specificity (98.96%) for severe cases when compared to MDCTSI. These results demonstrate that MAS has a strong concordance with MDCTSI in categorizing disease severity, making it a reliable predictor in early-stage assessment. MAS’s predictive values (PPV and NPV) for mild, moderate, and severe cases further supported its accuracy in reflecting disease status. Conclusion: The Modified Atlanta Score is an effective, bedside alternative to MDCTSI, providing timely severity assessment in acute gallstone-induced pancreatitis. Its ease of use and reliability make it particularly useful in settings where imaging resources are limited or where rapid decisions are needed. Incorporating MAS in routine evaluation may enhance clinical decision-making, enabling targeted, early interventions and improving patient outcomes.