| Variable¶ | RH (95% CI) | p-value |
| Age, per 10-yr increments+ | 1.50 (1.21–1.87) | <0.001 |
| Female sex | 2.00 (1.08–3.69) | 0.03 |
| ICU admission | 3.31 (1.67–6.56) | 0.001 |
| Renal failure | 2.73 (1.42–5.27) | 0.003 |
| Corticosteroid therapy | 2.54 (1.04–6.20) | 0.04 |
| CRP >500 mg·L−1 | 2.14 (1.02–4.48) | 0.04 |
RH: relative hazard; ICU: intensive care unit; CRP: C-reactive protein. #: multivariate analysis; ¶: variables significant on univariate analysis; +: age was included in the model as a continuous variable on a 10-yr scale.