The classification of acute pancreatitis according to the 1992 Atlanta and revision in 2007 Groups Classification Total (n = 165) Group 1 (n = 83) Group 2 (n = 82) p n% n% n% Mild 66 40 31 37.4 35 42.7 > 0.05 Moderate 58 35.2 31 37.4 27 32.9 > 0.05 Severe 41 24.8 21 25.2 20 24.4 > 0.05 Total 165 100 83 100 82 100 - 14 Comment: According to the classification of acute pancreatitis of the 1992 Atlanta and revision in 2007, patients with mild acute pancreatitis accounted for the highest proportion.