Highlights Alkaline phosphatase: sensitivity of 97.6% and specificity of 72.6% for choledocholitiasis. The average cost of cholangioresonance would have decreased by almost half for each patient in this study. ABSTRACT Objective To assess the predictive value of preoperative serum laboratory test results for identifying choledocholithiasis and reduce the use of cholangioresonance and its inherent costs. Methods Patients aged 21-69 years who underwent preoperative cholangioresonance examination at our institute were included. Patients with a history of fluctuating jaundice or biliary pancreatitis, […]