| Univariable analysis | Multivariable analysis: Model 1 | Multivariable analysis: Model 2 | |||
---|---|---|---|---|---|---|
HR (95% CI) | P value | aHRa (95% CI) | P value | aHRa (95% CI) | P value | |
In-hospital mortality | ||||||
 None | 1.00 |  | 1.00 |  | 1.00 |  |
 Moderate | 1.53 (1.10–2.14) | 0.013 | 1.48 (1.06–2.07) | 0.022 | 1.51 (1.08–2.11) | 0.016 |
 Severe | 3.50 (2.42–5.07) |  < 0.001 | 2.88 (1.98–4.17) | < 0.001 | 2.88 (1.98–4.17) | < 0.001 |
 Very severe | 3.95 (2.78–5.62) | < 0.001 | 3.84 (2.70–5.46) | < 0.001 | 3.83 (2.70–5.45) | < 0.001 |
7-day mortality | ||||||
 None | 1.00 |  | 1.00 |  | 1.00 |  |
 Moderate | 1.24 (0.80–1.93) | 0.330 | 1.48 (1.06–2.07) | 0.448 | 1.22 (0.79–1.90) | 0.369 |
 Severe | 3.61 (2.52–5.78) | < 0.001 | 2.88 (1.98–4.17) | < 0.001 | 2.96 (1.84–4.76) | < 0.001 |
 Very severe | 3.77 (2.40–5.94) | < 0.001 | 3.84 (2.70–5.46) | < 0.001 | 3.51 (2.22–5.53) | < 0.001 |