TABLE 1.
General characteristics of the study population
| ZEEP=0 cmH2O (n=33) | PEEP=5 cmH2O (n=30) | P | |
|---|---|---|---|
| Age, years (mean ± SD) | 64±18 | 65±14 | 0.74 |
| Male sex, n | 21 | 17 | 0.63 |
| APACHE II score, mean ± SD | 19.5±7.6 | 18.5±5.5 | 0.78 |
| Chronic health/diseases, n | |||
| Heart | 18 | 16 | 0.94 |
| Dyslipidemia | 8 | 12 | 0.27 |
| Arterial hypertension | 12 | 12 | 0.81 |
| Atrial fibrillation | 5 | 6 | 0.74 |
| COPD/asthma | 10 | 8 | 0.80 |
| Neoplasia | 9 | 8 | 0.97 |
| Hematological | 3 | 7 | 0.31 |
| Kidney | 5 | 4 | 0.90 |
| Obesity (BMI >40 kg/m2) | 1 | 3 | 0.68 |
| Neurological | 4 | 2 | 0.70 |
| Gastrointestinal | 7 | 5 | 0.75 |
| Diabetes mellitus | 4 | 10 | 0.13 |
| Endocrinological (others) | 4 | 2 | 0.70 |
| Alcohol and toxic/drug abuse | 2 | 3 | 0.78 |
APACHE Acute Physiology and Chronic Health Evaluation; BMI Body mass index; COPD Chronic obstructive pulmonary disease; PEEP Positive end-expiratory pressure; ZEEP Zero end-expiratory pressure