Severity of acute respiratory failure

Acute lung injury (ALI)

24 (82.8%)

Acute Respiratory Distress Syndrome (ARDS)

2 (6.9%)

paO₂/FiO₂ ratio at admission

276.4 ± 29.6

Need of vasopressor

11 (37.9%)

Ventilatory outcome

Duration of ventilation (hours)

50.6 ± 17.2

Conversion to mechanical ventilation

3 (10.3%)