Stability of neurocognitive impairment in different subtypes of mild cognitive impairment

David Loewenstein, Amarilis Acevedo, Joscelyn Agron, Ranjan Duara

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

There has been increasing interest in delineating different cognitive subtypes of mild cognitive impairment (MCI). It remains unclear, however, the extent to which neuropsychological impairment associated with amnestic, nonamnestic, and amnestic+ subtypes of MCI remains stable over time. In this study, 70 persons meeting the criteria for MCI and 38 cognitively normal elderly subjects received a baseline neuropsychological evaluation and were reevaluated 1 year later. Our results indicated that 84.6% of the persons initially classified as amnestic, 75% of those classified as nonamnestic, and 80% of the persons classified as MCI+ evidenced stable or more pronounced neuropsychological impairment across the follow-up period. Less than 7% of the amnestic and amnestic+ cases had nonimpaired neuropsychological profiles at their reevaluation at 12 months, and 16.7% of the nonamnestic cases had nonimpaired neuropsychological test profiles at follow-up. Approximately 87% of the cognitively normal subjects at baseline continued to have unimpaired neuropsychological performance at follow-up. These results indicate that the presence of neuropsychological impairment is relatively stable over a 12-month follow-up period among different cognitive subtypes of MCI, although 15-25% of the cases did not exhibit the specific cognitive deficits that characterized their performance at baseline.

Original languageEnglish
Pages (from-to)82-86
Number of pages5
JournalDementia and Geriatric Cognitive Disorders
Volume23
Issue number2
DOIs
StatePublished - Jan 1 2007

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Neuropsychological Tests
Cognitive Dysfunction

Keywords

  • Alzheimer's disease
  • Cognitive subtypes, mild cognitive impairment
  • Mild cognitive impairment
  • Neuropsychological stability, neurocognitive impairment

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Geriatrics and Gerontology

Cite this

Stability of neurocognitive impairment in different subtypes of mild cognitive impairment. / Loewenstein, David; Acevedo, Amarilis; Agron, Joscelyn; Duara, Ranjan.

In: Dementia and Geriatric Cognitive Disorders, Vol. 23, No. 2, 01.01.2007, p. 82-86.

Research output: Contribution to journalArticle

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