Covariate | Odds ratio | 95% Confidence interval |
---|---|---|
Mean PaO2 in kPa: | Â | Â |
   < 8.9 (n = 402) | 1.63 | 1.16 to 2.3 |
   8.9 to 10.6 (n = 871) | 1.51 | 1.18 to 1.96 |
   10.6 to 12.6 (n = 970) | 1.25 | 0.99 to 1.57 |
   12.6 to 16.4 (reference category) (n = 841) | 1 |  |
   > 16.4 (n = 238) | 1.04 | 0.64 to 1.68 |
   Mean FiO2 (per 10%) | 1.63 | 1.47 to 1.81 |