| Respiratory failure within 48 h | |
---|---|---|
Variables | RF subgroup | ES subgroup |
N (cases) | 29 | 31 |
Demographic factors: | ||
 Age (yrs) | 70.8 ± 15.6 | 62.3 ± 22.2 |
 Male | 18 (62) | 17 (55) |
 BMI (kg/m2) | 24.4 ± 5.3 | 24.3 ± 4.3 |
Comorbidities: | ||
 Chronic respiratory diseasesa | 19 (66) | 7 (23)* |
 Coronary heart disease | 16 (55) | 7 (23)* |
 Myocardial infarction | 11 (38) | 6 (19) |
 Hypertension | 17 (59) | 19 (61) |
 Atrial fibrillation | 8 (28) | 3 (32) |
 Diabetes | 11 (38) | 12 (39) |
 Renal dysfunction | 10 (29) | 5 (16) |
 Cerebral vascular diseasesb | 6 (21) | 4 (13) |
Clinical characteristics: | ||
 APACHE II | 23.9 ± 4.7 | 20 ± 6.4* |
 Duration from onset to the first intubation (d) | 6.3 [1.5–9] | 3.6 [1–6]* |
 Duration of the first intubation to extubation (d) | 10.4 ± 6.9 | 7.2 ± 4.7* |
 RR (breaths/min) | 21.6 ± 4.3 | 21.5 ± 4.7 |
 VT (l) | 0.43 ± 0.12 | 0.41 ± 0.09 |
 RSBI | 55.8 ± 22.2 | 55.9 ± 22.1 |
 GCS | 13.4 [13–15] | 13.8 [13–15] |
 WBC (×109/l) | 9.8 ± 3.9 | 10.9 ± 5.6 |
 Hemoglobin (g/l) | 103 ± 23 | 89 ± 14* |
 Albumin (g/l) | 28.8 ± 4.2 | 27.7 ± 3.9 |
 Plasma creatinine (micromole/l) | 121 ± 74 | 115 ± 80 |