What is the incidence of delirium in the US?

Updated: Apr 25, 2019
  • Author: Kannayiram Alagiakrishnan, MD, MBBS, MPH, MHA; Chief Editor: Glen L Xiong, MD  more...
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Delirium is common in the United States. In a systematic review of 42 cohorts in 40 studies, 10–31% of new hospital admissions met criteria for delirium and the incidence of developing delirium during the admission ranged from 3–29%. [19]

For patients in intensive care units the prevalence of delirium may reach as high as 80%. [2]

Prevalence of postoperative delirium following general surgery is 5–10% and as high as 42% following orthopedic surgery. As many as 80% of patients develop delirium near death. Delirium is extremely common among nursing home residents.

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