P value | Hazard ratio (95% confidence interval) | |
---|---|---|
Age (per year) | 0.019 | 1.044 (1.007–1.083) |
Time-dependent covariate for age | 0.028 | 0.949 (0.905–0.994) |
Duration of mechanical ventilationa | 0.007 | 2.306 (1.250–4.254) |
Palliative surgery | < 0.001 | 4.458 (2.032–9.778) |
Number of surgical revisions (per revision)b | 0.005 | 0.097 (0.019–0.495) |
Surgery for malignant diseases | 0.010 | 2.339 (1.227–4.460) |