ALB and acute pancreatitis: The associations between the serum albumin level and mortality were stronger in subgroups of patients with one day from pain onset to admission, nonbiliary etiology, and chronic concomitant diseases than those in subgroups with two or three days from pain onset to admission and biliary etiology and without chronic concomitant diseases; (iii) as a predictor, the serum albumin had moderate and excellent performance for prediction of persistent organ failure (AUC: 0.78) and mortality (AUC: 0.87) in acute pancreatitis, respectively.