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Patient characteristics
| Sex (M/F) | 25/14 |
| APACHE II (SD) | 29 (8) |
| Age, years (SD) | 65 (15) |
| BMI (SD) | 26 (5) |
| Onset ARDS, hours (SD) | 40 (58)a |
| Tidal volume ml/kg PBW (SD) | 7.8 (2.5) |
| PaO2/FiO2, mmHg (SD) | 147 (61) |
| Type of admission | |
| Pneumonia (%) | 20 (51) |
| Sepsis (%) | 11 (28) |
| Cardiac arrest (%) | 3 (8) |
| Other (%) | 5 (13) |
| ARDS | |
| Mild ARDS (%) | 7 (18) |
| Moderate ARDS (%) | 21 (54) |
| Severe ARDS (%) | 11 (28) |
aHours between fulfilling the ARDS criteria and the EIT measurement. Data are expressed as mean ± SD
