Table 1.

Etiology of acute respiratory failure (n = 63)

Etiology	Number (%)
Acute exacerbations of COPD	24 (38.1)
Others
Pneumonia	15 (23.8)
Sepsis-related lung injury	9 (14.3)
Asthma	6 (9.5)
Acute worsening of obstructive sleep apnea	6 (9.5)
Post-extubation respiratory failure	3 (4.8)
Hypercapnic	37
Hypoxemic	26

Note: Numbers in parenthesis are percentages until otherwise stated.

Abbreviation: COPD, chronic obstructive pulmonary disease.