Univariate analysis for recurrence of bile duct stones in 453 patients who were treated before February 1987
| Variable | RR | 95% CI | p Value |
|---|---|---|---|
| RR, relative risk; CI, confidence interval. | |||
| Duct diameter | |||
| <11 mm | 1 | ||
| ≥11 mm | 0.94 | 0.44–2.01 | 0.878 |
| Stone diameter | |||
| <11 mm | 1 | ||
| ≥11 mm | 0.96 | 0.55–1.67 | 0.881 |