Table 1.
Characteristics of the patients
| Number of patients n (%) | 367 (100) |
| Male, n (%) | 219 (59.7) |
| Age in years, median (IQR) | 61 (49–72) |
| Weight Kg, median (IQR) | 70 (60–80) |
| Height cm, mean (SD) | 163.6 (10) |
| Body mass index kg/m2, Median (IQR) | 25.3 (21.7–29.1) |
| Active Smoking, n (%) | 33 (9) |
| Active alcoholism, n (%) | 22 (6) |
| Reason for ICU admission, n (%) | |
| Medical | 345 (94) |
| Surgical (only postsurgical) | 22 (6) |
| Type of ventilatory failure, n (%) | |
| Shock | 52 (14.9) |
| Hypercapnia (pH < 7.25, high CO2) | 23 (6.6) |
| Hypoxemia (PaO2 < 60, usual FiO2) | 261 (75) |
| Neuromuscular | 2 (0.6) |
| Perioperative | 10 (2.9) |
| Immunosuppression, n (%) | 72 (19.6) |
| Pharmacological, n (%) | 25 (6.8) |
| HIV, n (%) | 10 (2.7) |
| Others, n (%) | 63 (17.2) |
| Comorbidities, n (%) | |
| Diabetes Mellitus | 113 (30.8) |
| Hypertension | 173 (47.1) |
| Asthma | 8 (2.2) |
| Pulmonary fibrosis | 6 (1.6) |
| Chronic kidney disease | 69 (18.8) |
| Chronic liver disease | 17 (4.6) |
| Neoplasms, n (%) | |
| Hematological | 7 (1.9) |
| Solid neoplasms | 2 (0.5) |
| Solid neoplasms Chest | 1 (0.3) |
| Solid neoplasms Abdomen | 9 (2.4) |
| Solid musculoskeletal neoplasms | 4 (1.1) |
IQR interquartile range, SD standard deviation, Kg kilograms, cm centimeters, ICU intensive care unit. CNS central nervous system