Prognosis depends in part on the underlying insult, the presence of other organ dysfunctions and the age and chronic health of the patient. Predominant single-organ ARDS carries a mortality of 30-50%; there does appear to have been some improvement over the last decade.

Some deterioration on lung function testing is usually detectable in survivors of ARDS, even in those who are relatively asymptomatic. Recent studies indicate that a significant proportion of survivors of ARDS have physical and/or psychological sequelae at 1 year.

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