Parameter | ARDS | Mild | Moderate | Severe | P valuea |
---|---|---|---|---|---|
n = 527 | n = 51 | n = 250 | n = 226 |  | |
Progression of ARDS severity | |||||
 Progression to moderate | 26/51 (51.0) | 26/51 (51.0) | – | – |  |
 Progression to severe | 128/301 (42.5) | 16/51 (31.4) | 112/250 (44.8) | – |  |
Invasive ventilation-free days to day 28, median (IQR), days | 6 (0–22) | 21 (0–28) | 12 (0–23) | 0 (0–18) | 0.000 |
IPPV barotrauma | 31 (7.8) | 1 (3.3) | 15 (8.5) | 15 (7.7) | 0.5621 |
 Subcutaneous emphysema | 14 (2.6) | 0 (0.0) | 7 (2.8) | 7 (3.0) | 0.2362 |
 Mediastinal emphysema | 19 (3.6) | 0 (0.0) | 8 (3.2) | 11 (4.8) | 0.0946 |
 Pneumothorax | 23 (4.3) | 1 (2.0) | 11 (4.4) | 11 (4.8) | 0.6149 |
HAI | 135 (25.6) | 9 (17.6) | 58 (23.2) | 68 (30.1) | 0.089 |
HAP | 117 (22.3) | 6 (12.0) | 50 (20.0) | 61 (27.2) | 0.031 |
CRBSI | 23 (4.4) | 2 (4.0) | 9 (3.6) | 12 (5.4) | 0.640 |
BSI | 31 (5.9) | 3 (5.9) | 12 (4.8) | 16 (7.1) | 0.5889 |
Intra-abdominal infection | 10 (1.9) | 1 (2.0) | 5 (2.0) | 4 (1.8) | 0.983 |
Other HAI | 15 (3.0) | 1 (2.0) | 8 (3.3) | 6 (2.8) | 0.879 |
Organ failure | |||||
 At least one extrapulmonary organ failure | 241 (45.7) | 15 (29.4) | 104 (41.6) | 122 (54.0) | 0.001 |
 Shock | 191 (36.3) | 14 (27.5) | 84 (33.2) | 94 (41.8) | 0.058 |
 Kidney | 130 (24.7) | 5 (9.8) | 61 (24.4) | 64 (28.4) | 0.020 |
  CRRT | 119 (22.6) | 10 (19.6) | 54 (21.6) | 55 (24.3) | 0.568 |
 Liver | 57 (10.8) | 5 (9.8) | 22 (8.8) | 30 (13.3) | 0.275 |
 Coagulation | 64 (12.2) | 5 (9.8) | 31 (12.4) | 28 (12.4) | 0.863 |
 GCS | 38 (7.3) | 4 (7.8) | 14 (5.6) | 20 (9.0) | 0.378 |
ICU length of stay, median (IQR), days | 11 (7, 21) | 7 (5, 17) | 12 (7, 20) | 12 (6, 21) | 0.080 |
ICU mortalityc | 232 (44.0) | 15 (29.4) | 96 (38.4) | 121 (53.5) | 0.000 |
Hospital length of stay, median (IQR), days | 19 (10, 29) | 15 (9, 23) | 20 (12, 30) | 17 (9, 29) | 0.049 |
Hospital mortalityc | 244 (46.3) | 16 (31.4) | 101 (40.4) | 127 (56.2) | 0.000 |
Withdrawal of life sustaining careb | 92 (17.5) | 5 (9.8) | 38 (15.2) | 49 (21.7) | 0.021 |
Patients except withdrawal | |||||
 ICU mortality | 140 (32.2) | 10 (21.7) | 58 (27.4) | 72 (40.7) | 0.005 |
 Hospital mortality | 152 (34.9) | 11 (23.9) | 63 (29.7) | 78 (44.1) | 0.003 |