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Generalized Psychophysiological Interaction (PPI) Analysis of Memory Related Connectivity in Individuals at Genetic Risk for Alzheimer's Disease

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Memory complaints to the general practitioner: data from the GuidAge study.

N Coley¹, P J Ousset, S Andrieu

¹Inserm, U558, F-31073, Toulouse, France.

The Journal of Nutrition, Health & Aging

|January 1, 2008

Summary

Subjective memory complaints in older adults may signal early cognitive decline, even before standard tests detect it. These memory issues in the elderly can predict future Alzheimer's disease progression.

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Area of Science:

Gerontology
Neurology
Cognitive Science

Background:

Memory complaints are common in the elderly but often unreported to general practitioners (GPs).
Subjective memory complaints may precede objective cognitive impairment detectable by standard tests.
These complaints can be early indicators of neurodegenerative processes and predict future cognitive decline.

Purpose of the Study:

To investigate the predictive value of memory complaints in non-demented older adults for cognitive decline.
To identify specific memory complaints associated with the early stages of neurodegeneration.
To emphasize the clinical significance of memory complaints in secondary Alzheimer's disease prevention.

Main Methods:

The GuidAge study enrolled non-demented individuals aged 70+ reporting memory problems to their GP.
Participants underwent baseline assessments, including the Clinical Dementia Rating (CDR) scale and McNair and Kahn scale.
A secondary prevention trial design was employed for Alzheimer's disease.

Main Results:

Over half of the study participants had a CDR score of 0.5 at baseline, indicating mild cognitive impairment.
Reported memory problems varied significantly, with item-specific percentages ranging from 6.2% to 78.6% on the McNair and Kahn scale.
Certain memory complaints demonstrated a stronger association with the initial neurodegenerative process.

Conclusions:

Memory complaints in older adults are clinically significant and should not be underestimated.
Specific subjective memory complaints may serve as early predictors of future cognitive decline and Alzheimer's disease.
Early identification and management of memory complaints are crucial for secondary Alzheimer's disease prevention.