Which one of the following statements about delirium and dementia is most accurate?
A) A person who has dementia can suffer from delirium.
B) Dementia and delirium are the same.
C) Delirium causes a progressive, irreversible decline in cognition.
D) Dementia occurs in all elderly persons.
A
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Persons with dementia can develop delirium as a response to an acute condition but be undiagnosed because changes are not understood or identified. Both dementia and delirium cause cognitive impairment, but there are significant differences in the two disorders. Dementia causes a progressive, irreversible decline in cognition. Dementia occurs in approximately 5% of the elderly population.
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