Table 1.
Baseline characteristics
| Characteristic | Value |
| Age (years) | 55 ± 17 |
| Male sex | 28 (68%) |
| APACHE II score | 22 ± 4.9 |
| ALI score | 3.1 ± 0.4 |
| PEEP, cmH2O | 11.1 ± 3.1 |
| PaO2/FiO2, mmHg | 116 ± 43 |
| BAL before biopsy | 32 (78%) |
| HRCT before biopsy | 22 (54%) |
| Underlying disease | |
| Immunocompetent | 24 (59%) |
| Immunocompromised | 17 (41%) |
| Hematological malignancy | 10 |
| Solid cancer | 4 |
| HIV infection | 2 |
| Renal transplantation | 1 |
| Days from intubation to biopsy | 3.0 ± 1.9 |
APACHE, Acute Physiology and Chronic Health Evaluation; ALI, acute lung injury; PEEP = positive end-expiratory pressure; PaO2, arterial partial pressure of oxygen; FiO2, fraction of inspired oxygen; BAL, bronchoalveolar lavage; HRCT, high-resolution computed tomography. Data are presented as mean ± SD or n (%).