Table 4: Endoscopic retrograde cholangiopancreatography findings.

Group A Group B value

Diameter of the common bile duct9.7 ± 2.1 13.0 ± 4.7 0.043
Morphology of the bile duct0.061
 Normal or mild irregularity 3 5
 Unilateral narrowing 5 12
 Bilateral narrowing 1 20