Table 4.
Univariate and Multivariate Cox Proportional Hazard Models for Stent Patency and Survival
| Risk factor | No. | Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|---|
| HR (95% CI) | p-value | HR (95% CI) | p-value | |||
| Stent patency | ||||||
| Age ≥75 yr | 62 | 0.95 (0.58–1.57) | 0.84 | |||
| Female sex | 53 | 0.69 (0.42–1.15) | 0.16 | 0.64 (0.38–1.08) | 0.10 | |
| Cholangiocarcinoma | 80 | 1.24 (0.64–2.40) | 0.52 | |||
| Bismuth type IV | 62 | 0.79 (0.47–1.33) | 0.38 | 0.71 (0.42–1.21) | 0.21 | |
| Trisegment drainage | 80 | 1.32 (0.74–2.36) | 0.34 | 1.37 (0.76–2.45) | 0.29 | |
| Procedure time >70 min | 58 | 1.02 (0.62–1.68) | 0.92 | |||
| Chemotherapy | 74 | 0.87 (0.48–1.57) | 0.64 | |||
| Survival | ||||||
| Age ≥75 yr | 62 | 1.50 (1.01–2.23) | 0.041 | 0.92 (0.57–1.50) | 0.76 | |
| Female sex | 53 | 1.04 (0.70–1.53) | 0.83 | |||
| Cholangiocarcinoma | 80 | 0.56 (0.37–0.87) | 0.01 | 0.38 (0.22–0.64) | <0.001 | |
| Bismuth type IV | 62 | 0.70 (0.47–1.04) | 0.085 | 1.29 (0.80–2.07) | 0.28 | |
| Trisegment drainage | 80 | 1.08 (0.69–1.68) | 0.72 | |||
| Procedure-related adverse events | 17 | 1.10 (0.63–1.91) | 0.72 | |||
| Chemotherapy | 74 | 0.36 (0.23–0.56) | <0.001 | 0.28 (0.16–0.49) | <0.001 | |
HR, hazard ratio; CI, confidence interval.