Univariate analysis of variables associated with mortality
| Variable | OR | 95% CI | p-Value |
| WHO-PS | 3.59 | 1.66 to 7.76 | 0.001 |
| WHO-PS≥3 | 37.7 | 7.4 to 192.5 | 0.000 |
| EWS | 1.45 | 1.05 to 1.99 | 0.021 |
| Hb (g/dl) | 0.58 | 0.41 to 0.83 | 0.002 |
| Anaemia | 5.53 | 1.81 to 16.92 | 0.002 |
| LTOT | 2.99 | 1.03 to 8.65 | 0.043 |
| pH | 0.003 | 0.00 to 1.94 | 0.079 |
| pH<7.20 | 3.64 | 1.16 to 11.37 | 0.025 |
Anaemia: men Hb<13.0 g/dl; women<12.0 g/dl.
EWS, early warning score; Hb, haemoglobin; LTOT, long-term oxygen therapy; PS, performance score.