Mortality rates of 478 patients with ARDS when classified at baseline based on the values of PaO2/FiO2 at ARDS onset (Berlin criteria), after 24 h of usual care and at 24 h under a SVS
| Assessment | Mortality (%) by degree of severity | p Value | |||
|---|---|---|---|---|---|
| Severe | Moderate | Mild | Non-ARDS | ||
| At ARDS onset (baseline) | |||||
| Number of patients | 173 | 305 | – | – | 0.002 |
| Number of deaths, (%) | 93 (53.7) | 109 (35.7) | |||
| After 24 h of usual care | |||||
| Number of patients | 100 | 289 | 83 | 6 | 0.064 |
| Number of deaths, (%) | 53 (53.0) | 115 (39.8) | 33 (39.8) | 1 (16.7) | |
| At 24 h under SVS | |||||
| Number of patients | 103 | 243 | 108 | 24 | <0.000001 |
| Number of deaths, (%) | 69 (67.0) | 104 (42.8) | 26 (24.1) | 3 (12.5) | |
ARDS, acute respiratory distress syndrome; PaO2/FiO2, ratio of arterial partial pressure of oxygen to fraction of inspired oxygen; SVS, standardised ventilator settings.