• Hamad Hadi Al-Qahtani, Mohammed Khurshid Alam, and Muhammad Waheed.
• Department of Surgery, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia.
• J Coll Physicians Surg Pak. 2017 Feb 1; 27 (2): 75-79.

ObjectiveTo determine the predictability of harmless acute pancreatitis score (HAPS) in determining the severity of acute pancreatitis (AP) and compare it with Ranson's score.Study DesignProspective cohort study.Place And Duration Of StudyKing Saud Medical City, Riyadh, Kingdom of Saudi Arabia, between January 2012 and December 2015.MethodologyAll patients admitted with AP at King Saud Medical City, Riyadh, during 2012 - 2015 were studied prospectively. Patients were assessed by HAPS and Ranson's score. Predictability values of the two systems were analysed and compared.ResultsOut of 116 patients studied, 104 (89.6%) were HAPS positive and predicted to have mild disease. Pancreatitis was mild in 101 (87%) but severe in 3 (2.6%) patients who scored ≥ 3 Ranson's criteria. Among 12 HAPS negative patients, 10 scored ≥ 3 Ranson's criteria and developed severe pancreatitis while 2 (1.7%) with 2 positive Ranson's criteria developed mild pancreatitis. HAPS correctly predicted the disease severity in 101 (87%) patients, a sensitivity of 98% specificity of 77% and accuracy of 96%. Ranson's system predicted correctly in all but took 48 hours for assessment. Statistical analysis showed moderate agreement (Kappa = 0.776, p < 0.001), and positive relation (rs = 0.777, p < 0.001) between the two scores.ConclusionHAPS is effective in rapid identification of patient who will run non-severe course of AP. Assessment can be completed within one hour from presentation. Ranson's score, although more accurate, takes 48 hours to complete.

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