| Total | No collapse | Collapse | p-value |
---|---|---|---|---|
 | (n = 885) | (n = 621) | (n = 264) | |
Age in years, mean ± SD | 58.4 ± 0.6 | 56.0 ± 0.7 | 64.0 ± 0.9 | <0.0001 |
Male gender, n (%) | 563 (64.6) | 387 (63.4) | 176 (67.4) | 0.28 |
SAPS II score regardless of age, mean ± SD | 36.8 (16.7) | 35.8 (16.5) | 39.3 (17.1) | 0.006 |
Surgical admission, n (%) | 271 (30.6) | 195 (31.4) | 76 (28.8) | 0.47 |
SOFA score, mean ± SD | 5.0 ± 0.1 | 4.8 ± 0.1 | 5.3 ± 0.2 | 0.02 |
Reason for ICU admission: | Â | Â | Â | Â |
 Acute respiratory failure, n (%) | 422 (48.7) | 260 (41.9) | 162 (61.4) | <0.0001 |
 Postoperative complications, n (%) | 92 (10.4) | 60 (9.7) | 32 (12.1) | 0.28 |
 Brain injury, n (%) | 263 (29.7) | 216 (34.8) | 47 (17.8) | <0.0001 |
 Acute kidney injury, n (%) | 54 (6.1) | 40 (6.4) | 14 (5.3) | 0.65 |
 Trauma, n (%) | 62 (7.0) | 51 (8.2) | 11 (4.2) | 0.03 |
Past medical history | Â | Â | Â | Â |
 Tobacco, n (%) | 297 (33.6) | 205 (33.0) | 92 (34.9) | 0.64 |
 Cirrhosis, n (%) | 83 (9.4) | 64 (10.3) | 19 (7.2) | 0.17 |
 COPD, n (%) | 153 (17.3) | 95 (15.3) | 58 (22.0) | 0.02 |
 Obesity, n (%) | 163 (18.4) | 114 (18.4) | 49 (18.6) | 0.94 |
 Diabetes, n (%) | 131 (14.8) | 89 (14.3) | 42 (15.9) | 0.55 |
Reasons for intubation | Â | Â | Â | Â |
 Coma, n (%) | 241 (27.2) | 194 (31.2) | 47 (17.8) | <0.0001 |
 Acute respiratory failure, n (%) | 597 (67.5) | 375 (60.4) | 222 (84.1) | <0.0001 |
 Extubation failure, n (%) | 148 (16.7) | 111 (17.9) | 37 (14.0) | 0.17 |
 Other, n (%) | 94 (10.6) | 83 (13.4) | 11 (4.2) | 0.88 |