Validation of the Dépistage Cognitif de Québec in the Oldest Old

We aimed to validate the (DCQ; www.dcqtest.org), a new cognitive screening tool for atypical degenerative syndromes, in the oldest old. The DCQ was developed by expert behavioural neurologists and clinical neuropsychologists based on updated criteria for Alzheimer's disease, primary progressive...

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Bibliographic Details
Published in:Canadian geriatrics journal CGJ 2020-12, Vol.23 (4), p.283-288
Main Authors: Gravel, Amélie, Hudon, Carol, Meilleur-Durand, Synthia, Sellami, Leila, Bergeron, David, Paradis, Audrey, Verret, Louis, Fortin, Marie-Pierre, Poulin, Stéphane, Macoir, Joël, Bouchard, Rémi W, Laforce, Jr, Robert
Format: Article
Language:English
Subjects:
Alzheimer's disease
Apathy
Dementia
Language
Memory
Neuropsychology
Original Research
Questionnaires
Semantics
Speaking
Statistical analysis
Validation studies
Validity
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Summary:We aimed to validate the (DCQ; www.dcqtest.org), a new cognitive screening tool for atypical degenerative syndromes, in the oldest old. The DCQ was developed by expert behavioural neurologists and clinical neuropsychologists based on updated criteria for Alzheimer's disease, primary progressive aphasia, and behavioural variant frontotemporal dementia. It targets five relevant cognitive domains: Memory, Visuospatial, Executive, Language, and Behaviour. Validation was performed using a prospective community-based sample consisting of 53 healthy French-speaking Canadian volunteers aged between 80 and 94 years old. Normative data were derived from participants with no history of cognitive difficulties and a Montreal Cognitive Assessment (MoCA) score ≥ 24. The mean DCQ total score (out of 100) was 84.65 (SD = 6.33). Pearson's correlation coefficient showed a moderate, but significant, correlation ( = 0.36, < .01) with the MoCA. Normative data shown in percentiles were stratified by age and education for DCQ total score and for each of the five cognitive domains. This study suggests that the DCQ is a valid cognitive screening test in the oldest old. It is proposed that the DCQ can help early identification of atypical degenerative syndromes.
ISSN:1925-8348
1925-8348
DOI:10.5770/cgj.23.432