Imaging-independent model for predicting choledocholithiasis in acute biliary pancreatitis

Figure 4 Comparison of decision rules for microlithiasis and sludge. Model performances were computed for two subgroups. A: Patients with gallstones (n = 45); B: Patients with sludge and/or microlithiasis (n = 25). Two receiver operating characteristic curves were plotted for each subgroup for the random forest model, the common bile duct diameter and bilirubin. AUC: Area under the curve; CDL: Choledocholithiasis; CBD: Common bile duct; CI: Confidence interval; FPR: False positive rate.