Table 2.
Patient demographics
| Parameters | Total cohort | Successful extubation | Failed extubation |
| n | 153 | 93 | 60 |
| Age (years) | 70 (60–78) | 70 (60–77) | 70 (59–79) |
| Male (n [%]) | 70 (45.8) | 37 (39.7) | 33 (55) |
| APACHE II score | 21 (17–28) | 21 (17–29) | 21 (16–26) |
| Etiology of respiratory failure | |||
| Pulmonary | 105 (68.6) | 67 (72) | 38 (63.3) |
| Cardiac | 14 (9.2) | 10 (10.8) | 4 (6.7) |
| Neurologic | 10 (6.5 | 5 (5.4) | 5 (8.3) |
| Renal | 2 (1.3) | 2 (2.2) | 0 (0) |
| Other | 16 (10.5) | 6 (6.5) | 10 (16.7) |
| Surgical service | 32 (20.9) | 10 (10.8) | 22 (36.7) |
| Gastrointestinal | 15 (9.8) | 3 (3.2) | 12 (20.0) |
| Vascular | 8 (5.3) | 2 (2.2) | 6 (10.0) |
| Thoracic | 6 (6.9) | 2 (2.2) | 4 (6.7) |
| Obstetric/gynecologic | 1 (0.6) | 1 (1.1) | 0 (0.0) |
| Days before initiation of weaning | 1 (0.5–2) | 1.25 (1–2.4) | 1 (0.5–2) |
| Pre-extubation (days) | 3 (1–7) | 4 (2–7) | 2 (1–5) |
Data presented as median (interquartile range) or as n (%). APACHE, Acute Physiology and Chronic Health Evaluation.