Table 3.

Risk factors for mortality in unadjusted and multivariable model Cox regression analysis

Initial Hospitalization CharacteristicUnadjustedMultivariable Model
HR95% CIHR95% CI
Admit age, d1.01.0 to 1.01.01.0 to 1.0
<37 wk at birth5.22.6 to 10.13.01.4 to 6.4
Kidney agenesis7.02.7 to 18.12.30.8 to 6.5
Kidney dysplasia2.00.9 to 4.10.90.4 to 2.0
Sepsis2.31.0 to 5.61.10.4 to 2.8
Pulmonary hypoplasia12.56.3 to 24.67.53.3 to 17.0
Hospital volume (reference ≤2 PUV case/yr)
 >2 PUV cases/yr0.340.16 to 0.730.380.17 to 0.82
  • HR, hazard ratio; 95% CI, 95% confidence interval; PUV, posterior urethral valves.