Evidence for Aging as the Cause of Alzheimer's Disease

Part 1 presents the results of a meta-analytic study on the effects of aging on intelligence. Analysis of a total of 20 longitudinal samples shows that most of the intelligence scores rose before the age of 50 and fell at a progressively increasing rate after the age of 50. An equation describing th...

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Published in:Psychological reports 2004-12, Vol.95 (3), p.935-945
Main Authors: Charter, Richard A., Alekoumbides, Apostolos
Format: Article
Language:English
Subjects:
Aged
Aging - physiology
Alzheimer Disease - epidemiology
Alzheimer Disease - physiopathology
Follow-Up Studies
Humans
Prejudice
Prevalence
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description Part 1 presents the results of a meta-analytic study on the effects of aging on intelligence. Analysis of a total of 20 longitudinal samples shows that most of the intelligence scores rose before the age of 50 and fell at a progressively increasing rate after the age of 50. An equation describing this rise and fall in intelligence was derived. Part 2 shows the relationship between the predicted prevalence of Alzheimer's disease (from the equation derived in Part 1) and the prevalence of the disease obtained from 10 studies. The predictive curve fit so well with the observed prevalence data that the results can be interpreted as evidence that Alzheimer's is a manifestation of aging.
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subjects Aged
Aging - physiology
Alzheimer Disease - epidemiology
Alzheimer Disease - physiopathology
Follow-Up Studies
Humans
Prejudice
Prevalence
title Evidence for Aging as the Cause of Alzheimer's Disease
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