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Neuropsychological Test Norms in Cognitively Intact Oldest-Old
Zarui A Melikyan1, Maria M Corrada1, Malcolm B Dick1
11Institute for Memory Impairments and Neurological Disorders,University of California,Irvine,California.
Summary
New neuropsychological test norms for cognitively intact individuals aged 90 and older are now available. These norms aid in distinguishing normal aging from cognitive impairment in the oldest-old population.
Area of Science:
- Gerontology
- Neuropsychology
- Cognitive Aging
Background:
- The oldest-old (90+ years) are the fastest-growing demographic.
- This group faces increased risk of cognitive impairment.
- Normative data for neuropsychological tests in this population is scarce.
Purpose of the Study:
- To provide normative data for neuropsychological tests in cognitively intact individuals aged 90 years and older.
- To facilitate accurate cognitive assessment in the oldest-old.
- To aid in the early detection of cognitive impairment.
Main Methods:
- Norms were derived from 403 cognitively intact participants in The 90+ Study.
- Participants ranged from 90 to 102 years (mean=94).
- A battery of 11 neuropsychological tests and the Geriatric Depression Scale were administered.
Main Results:
- Performance on most tests declined significantly with increasing age.
- Education, sex, and depressive symptoms influenced test scores, even after controlling for age.
Conclusions:
- The developed test norms are crucial for differentiating cognitively healthy oldest-old individuals from those with cognitive impairment.
- This resource supports more accurate clinical evaluations in very elderly populations.
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