Table 1.

Aetiology of respiratory failure.

Main condition	%
Post-operative	58.5
Pneumonia	13.8
COPD exacerbation	5.4
Post-cardiac arrest syndrome	5.4
Stroke/intracranial bleeding	5.3
Post-traumatic	4.7
Circulatory failure	3.1
Others	3.8

COPD: Chronic obstructive pulmonary disease.