Table 1.
The baseline characteristics of the 60 patients included in the study
| Variables | All patients | Group 1 | Group II | P-value |
|---|---|---|---|---|
| Age | 57.25 ± 18.05 | 50.81 ± 18.18 | 67.58 ± 12.55 | < 0.001 |
| Gender | 33 males | 16 (44.4%) | 17 (70.8%) | 0.044 |
| 27 females | 20 (55.6%) | 7 (29.2%) | ||
| Body mass index (BMI) | 28.04 ± 6.57 | 27.34 ± 5.39 | 29.08 ± 8.04 | 0.850 |
| Numbers of days before SBT | 5.23 ± 2.54 | 4.00 ± 1.69 | 7.08 ± 2.50 | < 0.001 |
| Comorbidities: | ||||
| Smoking | 28 | 11 (30.6%) | 17 (70.8%) | 0.002 |
| Diabetes mellitus (DM) | 22 | 12 (33.3%) | 10 (41.7%) | 0.512 |
| Hypertension (HTN) | 29 | 10 (27.8%) | 19 (79.2%) | < 0.001 |
| Systolic heart failure | 16 | 5 (13.9) | 11 (45.8) | 0.006 |
| Renal impairment | 22 | 12 (32.2%) | 10 (41.2) | 0.512 |
| Chronic obstructive pulmonary disease (COPD) | 19 | 5 (13.9%) | 14 (58.3%) | < 0.001 |
| Chronic liver disease | 6 | 6 (16.7%) | 0 | 0.072 |
| Ischemic heart disease (IHD) | 20 | 8 (22.2%) | 12 (50%) | 0.025 |
| Malignancy | 8 | 2 (5.6%) | 6 (25%) | 0.05 |
| Cause of mechanical ventilation | ||||
| Disturbed conscious level (DCL) | 15 | 13 (36.1%) | 2 (8.3%) | 0.001 |
| Pneumonia | 15 | 7 (19.4%) | 8 (33.3%) | |
| COPD excerbation | 12 | 2 (5.6%) | 10 (41.7%) | |
| Hemodynamic instability | 9 | 8 (22.2%) | 1 (4.2%) | |
| Acute pulmonary odema | 8 | 5 (13.9%) | 3 (12.5v) | |
| Pulmonary embolism | 1 | 1 (2.8%) | 0 | |
| Cardiac functions: | ||||
| Left ventricular ejection fraction | 56.35 ±10.44 | 59.5 | 51.5 | .009 |
| Outcomes: | ||||
| Duration of ICU stay | 13.10 ± 4.55 | 10.69 | 16.71 | < 0.001 |
| In hospital mortality | 7 | 2 | 5 | 0.104 |