Which age groups have the highest prevalence of delirium, dementia, and amnesia?

Updated: Sep 19, 2018
  • Author: Richard D Shin, MD; Chief Editor: Gil Z Shlamovitz, MD, FACEP  more...
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Delirium due to physical illness is more frequent among the very young and those in advanced age. Delirium due to drug and alcohol intoxication or withdrawal is most frequent in persons aged mid-teens to late thirties.

Dementia, particularly Alzheimer disease, is seen predominantly in elderly persons; however, certain types of dementia are seen in younger patients (eg, AIDS-related dementia, certain familial forms of Alzheimer disease), and some cases of variant Creutzfeldt-Jakob disease (ie, bovine spongiform encephalopathy or mad cow disease).

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