Validation of the Dépistage Cognitif de Québec in the Oldest Old

Authors

  • Amélie Gravel Université Laval
  • Carol Hudon Université Laval and Centre de recherche du CIUSSS de la Capitale-Nationale
  • Synthia Meilleur-Durand CHU de Québec, Université Laval
  • Leila Sellami Université Laval
  • David Bergeron Université Laval
  • Audrey Paradis Université Laval
  • Louis Verret Université Laval
  • Marie-Pierre Fortin Université Laval
  • Stéphane Poulin Université Laval
  • Joël Macoir Université Laval
  • Rémi W. `Bouchard Université Laval
  • Robert Jr Laforce CHU de Quebec

DOI:

https://doi.org/10.5770/cgj.23.432

Keywords:

Aging, Dementia, Oldest old, Alzheimer’s disease, Frontotemporal dementia, Atypical dementia, Validation, Normative data, Test construction

Abstract

Objective

We aimed to validate the Dépistage Cognitif de Québec (DCQ; www.dcqtest.org) , a new cognitive screening tool for atypical degenerative syndromes, in the oldest old.

Methods

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.

Results

The mean DCQ total score (out of 100) was 84.65 (SD = 6.33). Pearson’s correlation coefficient showed a moderate, but significant, correlation (r = 0.36, p < .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.

Conclusions

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.

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Published

2020-11-23

How to Cite

1.
Gravel A, Hudon C, Meilleur-Durand S, Sellami L, Bergeron D, Paradis A, Verret L, Fortin M-P, Poulin S, Macoir J, `Bouchard RW, Laforce RJ. Validation of the Dépistage Cognitif de Québec in the Oldest Old. Can Geriatr J [Internet]. 2020 Nov. 23 [cited 2021 Dec. 4];23(4):283-8. Available from: https://cgjonline.ca/index.php/cgj/article/view/432

Issue

Section

Original Research