Table 6 Factors of procedural failure: multivariate analysis
| Variable | OR (95% CI) | P value |
|---|---|---|
| Multiple cannulation attempts | 5.283 (1.088, 25.659) | 0.039 |
| Endoscopic papillary balloon dilation | 4.381 (1.191, 16.114) | 0.026 |
| Biopsy in the bile duct or papilla | 35.432 (2.693, 466.104) | 0.007 |