Table 1. Baseline characteristics of the study population.
| Characteristic | T-piece (99) | PSV (91) |
|---|---|---|
| Age—years | 67.99 ± 11.37 | 67.30 ± 9.83 |
| Male sex—n (%) | 52 (52.2) | 50 (54.9) |
| SAPS III score | 68.04 ± 12.36 | 67 ± 14.28 |
| Hypercapnic exacerbation | 69 (70.4) | 55 (61.8) |
| 24 h pre-SBT fluid balance—ml | 128.52 ± 1436 | 375. 73 ± 1428 |
| Setting from which the patient was admitted to the ICU—n (%) | ||
| Emergency room | 56 (57.1) | 44 (49.4) |
| Ward | 32 (32.7) | 37 (41.6) |
| Others | 10 (10.1) | 8 (8.8) |
| Reason for mechanical ventilation—n (%) | ||
| Exacerbation of COPD | 40 (40.4) | 36 (40.4) |
| Pneumonia | 35 (35.4) | 34 (38.2) |
| CNS depression | 8 (8.1) | 7 (7.9) |
| Post-operative | 5 (5.1) | 5 (5.6) |
| Acute decompensated heart failure | 2 [19] | 0 (0) |
| Pulmonary embolism | 1 (1) | 0 (0) |
| Other causes | 8 (8,1) | 7 (7,9) |
Plus-minus values are means ± SD. There were no significant differences between the two groups in any of the characteristics listed. PSV, Pressure-Support Ventilation; SAPS, simplified acute physiology score; SBT, spontaneous breathing trial; ICU, intensive care unit; COPD, Chronic Obstructive Pulmonary Disease; CNS, central nervous system.