Table 3.
Risk factors for mortality in unadjusted and multivariable model Cox regression analysis
| Initial Hospitalization Characteristic | Unadjusted | Multivariable Model | ||
|---|---|---|---|---|
| HR | 95% CI | HR | 95% CI | |
| Admit age, d | 1.0 | 1.0 to 1.0 | 1.0 | 1.0 to 1.0 |
| <37 wk at birth | 5.2 | 2.6 to 10.1 | 3.0 | 1.4 to 6.4 |
| Kidney agenesis | 7.0 | 2.7 to 18.1 | 2.3 | 0.8 to 6.5 |
| Kidney dysplasia | 2.0 | 0.9 to 4.1 | 0.9 | 0.4 to 2.0 |
| Sepsis | 2.3 | 1.0 to 5.6 | 1.1 | 0.4 to 2.8 |
| Pulmonary hypoplasia | 12.5 | 6.3 to 24.6 | 7.5 | 3.3 to 17.0 |
| Hospital volume (reference ≤2 PUV case/yr) | ||||
| >2 PUV cases/yr | 0.34 | 0.16 to 0.73 | 0.38 | 0.17 to 0.82 |
HR, hazard ratio; 95% CI, 95% confidence interval; PUV, posterior urethral valves.