Table 2. Distribution of cases of biliary obstruction.
* X2 is significant at 0.05.
CBD, common bile duct; IHD, intrahepatic dilatation; US, ultrasound; MRCP, magnetic resonance cholangiopancreatography; ERCP, endoscopic retrograde cholangiopancreatography
| Level | US (n=146) | MRCP (n=146) | ERCP (n=146) | X2 | P-value |
| Diameter | 109 (74.7%) | 124 (84.9%) | 117 (80.1%) | 5.538 | 0.019* |
| CBD stone | 29 (19.1%) | 86 (58.9%) | 84 (57.5%) | 2.728 | 0.099 |
| Gallstone | 92 (63.0%) | 89 (61.0%) | 55 (37.7%) | 8.949 | 0.000* |
| IHD | 62 (42.5%) | 71 (48.6%) | 51 (34.9%) | 5.265 | 0.022* |