Table 4 Univariate and multivariate analysis for successful stent treatment for bile duct strictures.
| Factors | Total n = 110 (%) | Univariate analysis* | p Value | Multivariate analysis | p Value |
|---|---|---|---|---|---|
| Odds ratio (95% CI) | Odds ratio (95%CI) | ||||
| Gender, female | 79 (72%) | 2.3 (0.94 to 5.7) | 0.07 | 3.1 (1.0 to 9.5) | 0.05 |
| Initial procedure | |||||
| Open cholecystectomy | 13 (12%) | – | |||
| Laparoscopic cholecystectomy | 50 (45%) | 2.7 (0.78 to 9.5) | 0.15 | 1.4 (0.28 to 6.5) | 0.70 |
| Laparoscopy with conversion | 26 (24%) | 6.4 (1.4 to 29.5) | 0.017 | 5.6 (0.79 to 39.6) | 0.084 |
| Laparoscopy with conversion after BDI | 21 (19%) | 7.0 (1.4 to 36.0) | 0.020 | 7.3 (0.97 to 55.3) | 0.053 |
| Location of injury | |||||
| Bismuth I | 17 (15%) | – | |||
| Bismuth II | 64 (58%) | 0.52 (0.10 to 2.6) | 0.43 | 0.55 (0.87 to 3.6) | 0.53 |
| Bismuth III | 23 (21%) | 0.17 (0.03 to 0.94) | 0.042 | 0.12 (0.016 to 0.91) | 0.040 |
| Bismuth IV | 6 (5%) | 0.07 (0.01 to 0.63) | 0.018 | 0.039 (0.003 to 0.54) | 0.015 |
| Endoscopic stenting before referral | 28 (25%) | 0.44 (0.17 to 1.1) | 0.07 | 0.24 (0.06 to 0.88) | 0.032 |
| Number of stents inserted during first procedure | range (1–4) | 2.1 (0.97 to 4.4) | 0.06 | 3.19 (1.22 to 8.32) | 0.017 |
| Maximum number of stents inserted† | range (1–7) | 1.4 (0.96 to 2.2) | 0.08 |
Values in parentheses are percentages or 95% CIs. Factors analysed in univariate analysis with a
p value >0.1 include age, time of diagnose, type of injury according to the Amsterdam Classification, primary repair, surgical interventions before referral, and time interval between cholecystectomy and referral.
CI denotes confidence interval. *Binary logistic regression. †Factor not included in multivariate analysis due to significant correlation (p<.001) with number of stents inserted during first procedure.