We enrolled patients with acute pancreatitis who were at high risk for complications on the basis of an Acute Physiology and Chronic Health Evaluation II score of 8 or higher ( on a scale of 0 to 71 , with higher scores indicating more severe disease ) , an Imrie or modified Glasgow score of 3 or higher ( on a scale of 0 to 8 , with higher scores indicating more severe disease ) , or a serum C-reactive protein level of more than 150 mg per liter .