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Demographic data of patients with biliary strictures (n = 126)
| Benign | Malignant | P value | |
| Number of patients | 54 (%) | 72 (%) | |
| Mean age | 53 ± 18 | 62.4 ± 11.7 | 0.0006 |
| Males | 25 (46) | 41 (56.9) | 0.2255 |
| Females | 29 (54) | 31 (43.1) | 0.2255 |
| Sites of biliary stricture | |||
| Proximal | 27 (50) | 20 (27.7) | 0.0107 |
| Middle | 22 (41) | 17 (23.6) | 0.0394 |
| Distal | 5 (9) | 35 (48.6) | < 0.001 |
