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How common is Alzheimer's disease in adults over 65 years of age?
Almost 90% of people who are 65 years do NOT have Alzheimer's disease. The risk for Alzheimer's disease (AD) increases with age. It is estimated that only 5% of person's 65 years develop AD. For every five years of age there is a 10% increase in the development of AD to over 47% of the "old-old" cohort over 85 years. Alzheimer's disease (Senile Dementia of the Alzheimer's Type, SDAT) accounts for about 65% of all dementia. Dementia is a syndrome that includes personality change, language difficulties, decline in cognition, memory loss and increasing inability to perform activities of daily living. Its cause may be one or more of hundreds of conditions or diseases (psychiatric or physical, some treatable, others not).
Linda Breytspraak, Eliza Kendall, Burton
Halpert, Center on Aging Studies,
University of
Missouri-Kansas City
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Last update: Tuesday, March 14, 2006