Parameters predicting success on univariate analysis
| Variable | Odds ratio | 95% CI | Likelihood ratio χ2 | p Value |
|---|---|---|---|---|
| *Decrease in success with year increase in age. | ||||
| CI, confidence interval; CBD, common bile duct. | ||||
| Age* | 0.98 | 0.95–1.00 | 3.88 | 0.049 |
| CBD diameter (mm) | ||||
| <12 | 3.24 | 1.20–8.72 | 8.14 | 0.017 |
| ⩾12 | 1 | |||
| No of stones | ||||
| ⩽2 | 2.08 | 0.90–4.80 | 7.5 | 0.024 |
| >2 | 1 | |||
| Size of stones (mm) | ||||
| <10 | 10.0 | 2.24–44.64 | 17.72 | <0.001 |
| ⩾10 | 1 | |||