Multiple logistic regression and reverse multivariate logistic regression analyses to identify factors associated with fewer than six cannulation attempts
| Variable | OR | 95% CI | P value |
| Multiple logistic regression analysis | |||
| Patient age (years) | 0.98 | 0.95 to 1.01 | 0.106 |
| Patient gender: male vs female | 1.39 | 0.57 to 3.40 | 0.463 |
| Race: other vs white | 0.95 | 0.37 to 2.45 | 0.909 |
| ASGE grade of procedure difficulty | |||
| 2 vs 1 | 1.70 | 0.57 to 5.04 | 0.338 |
| 3 vs 1 | 1.27 | 0.17 to 9.76 | 0.816 |
| 4 vs 1 | 1.09 | 0.12 to 10.1 | 0.939 |
| Procedure type: biliary vs non-biliary interventions | 0.52 | 0.076 to 3.55 | 0.505 |
| Type of duodenoscope: single-use vs reusable | 3.58 | 1.44 to 8.94 | 0.006 |
| Reverse multivariate logistic regression analysis | |||
| Type of duodenoscope: single-use vs reusable | 3.00 | 1.27 to 7.07 | 0.012 |
ASGE, American Society for Gastrointestinal Endoscopy.;