Variable | Incidence, n (%) | Hospital mortality, n (%) | Unadjusted odds ratio for hospital mortality (95% CI) | Adjusted odds ratio for hospital mortality (95% CI) |
---|---|---|---|---|
PaO2/FiO2a | ||||
 ≤ 100 mmHg | 3314/23,624 (14.0%) | 2268/3314 (68.4%) | 2.18 (1.98–2.39), P < 0.001 | 1.79 (1.48–2.15), P < 0.001 |
 101–200 mmHg | 8393/23,624 (35.5%) | 5304/8393 (63.2%) | 1.72 (1.60–1.85), P < 0.001 | 1.63 (1.45–1.84), P < 0.001 |
 201–300 mmHg | 7313/23,624 (31.0%) | 4105/7313 (56.1%) | 1.28 (1.19–1.38), P < 0.001 | 1.36 (1.21–1.53), P < 0.001 |
 > 300 mmHg | 4604/23,624 (19.5%) | 2298/4604 (49.9%) | 1 (Reference category) | 1 (Reference category) |
PaO2b | ||||
 Hypoxemia | 4135/23,625 (17.5%) | 2704/4135 (65.4%) | 1.61 (1.45–1.80), P < 0.001 | 1.34 (1.10–1.65), P = 0.004 |
 Normoxia | 17,480/23,625 (74.0%) | 10,187 / 17,480 (58.3%) | 1.19 (1.09–1.31), P < 1.001 | 1.15 (0.98–1.35), P = 0.082 |
 Hyperoxemia | 2010/23,625 (8.5%) | 1085/2010 (54.0%) | 1 (Reference category) | 1 (Reference category) |
PaCO2a | ||||
 ≤ 35 mmHg | 5554/23,625 (23.5%) | 3621/5554 (65.2%) | 1.44 (1.34–1.54), P < 0.001 | 1.91 (1.63–2.24), P < 0.001 |
 36–45 mmHg | 9910/23,625 (41.9%) | 5605/9910 (56.6%) | 1 (Reference category) | 1 (Reference category) |
 46–50 mmHg | 3444/23,625 (14.6%) | 1906/3444 (55.3%) | 0.95 (0.88–1.03), P = 0.215 | 0.69 (0.55–0.86), P = 0.001 |
 51–55 mmHg | 1958/23,625 (8.3%) | 1079/1958 (55.1%) | 0.94 (0.86–1.04), P = 0.237 | 0.74 (0.53–1.04), P = 0.079 |
 > 55 mmHg | 2759/23,625 (11.7%) | 1765/2759 (64.0%) | 1.36 (1.25–1.49), P < 0.001 | 0.40 (0.23–0.70), P = 0.001 |