The Cognitive Online Self-Test Amsterdam (COST-A): Establishing norm scores in a community-dwelling population.
Alzheimer's disease
cognition
normative data
remote assessment
screener
self‐testing
Journal
Alzheimer's & dementia (Amsterdam, Netherlands)
ISSN: 2352-8729
Titre abrégé: Alzheimers Dement (Amst)
Pays: United States
ID NLM: 101654604
Informations de publication
Date de publication:
2021
2021
Historique:
received:
25
06
2021
accepted:
01
07
2021
entrez:
20
9
2021
pubmed:
21
9
2021
medline:
21
9
2021
Statut:
epublish
Résumé
Heightened public awareness about Alzheimer's disease and dementia increases the need for at-home cognitive self-testing. We offered Cognitive Online Self-Test Amsterdam (COST-A) to independent groups of cognitively normal adults and investigated the robustness of a norm-score formula and cutoff. Three thousand eighty-eight participants (mean age ± standard deviation = 61 ± 12 years, 70% female) completed COST-A and evaluated it. Demographically adjusted norm scores were the difference between expected COST-A scores, based on age, gender, and education, and actual scores. We applied the resulting norm-score formula to two independent cohorts. Participants evaluated COST-A to be of adequate difficulty and duration. Our norm-score formula was shown to be robust: ≈8% of participants in two cognitively normal cohorts had abnormal scores. A cutoff of -1.5 standard deviations proved optimal for distinguishing normal from impaired cognition. With robust norm scores, COST-A is a promising new tool for research and clinical practice, providing low cost and minimally invasive remote assessment of cognitive functioning.
Sections du résumé
BACKGROUND
BACKGROUND
Heightened public awareness about Alzheimer's disease and dementia increases the need for at-home cognitive self-testing. We offered Cognitive Online Self-Test Amsterdam (COST-A) to independent groups of cognitively normal adults and investigated the robustness of a norm-score formula and cutoff.
METHODS
METHODS
Three thousand eighty-eight participants (mean age ± standard deviation = 61 ± 12 years, 70% female) completed COST-A and evaluated it. Demographically adjusted norm scores were the difference between expected COST-A scores, based on age, gender, and education, and actual scores. We applied the resulting norm-score formula to two independent cohorts.
RESULTS
RESULTS
Participants evaluated COST-A to be of adequate difficulty and duration. Our norm-score formula was shown to be robust: ≈8% of participants in two cognitively normal cohorts had abnormal scores. A cutoff of -1.5 standard deviations proved optimal for distinguishing normal from impaired cognition.
CONCLUSION
CONCLUSIONS
With robust norm scores, COST-A is a promising new tool for research and clinical practice, providing low cost and minimally invasive remote assessment of cognitive functioning.
Identifiants
pubmed: 34541288
doi: 10.1002/dad2.12234
pii: DAD212234
pmc: PMC8438682
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e12234Informations de copyright
© 2021 The Authors. Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring published by Wiley Periodicals, LLC on behalf of Alzheimer's Association.
Déclaration de conflit d'intérêts
The authors report no conflict of interest.
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