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The Dépistage Cognitif de Québec: A New Clinician's Tool for Early Recognition of Atypical Dementia.

Publication Type:

Journal Article


Dement Geriatr Cogn Disord, Volume 46, Issue 5-6, p.310-321 (2018)


INTRODUCTION: Early recognition of atypical dementia remains challenging partly because of lack of cognitive screening instruments precisely tailored for this purpose.

METHODS: We assessed the validity and reliability of the Dépistage Cognitif de Québec (DCQ;, a newly developed cognitive screening test, to detect atypical dementia using a multicenter cohort of 628 participants. Sensitivity and specificity were compared to the Montreal Cognitive Assessment (MoCA). A predictive diagnostic algorithm for atypical dementia was determined using classification tree analysis.

RESULTS: The DCQ showed excellent psychometric properties. It was significantly more accurate than the MoCA to detect atypical dementia. All correlations between DCQ indexes and standard neuropsychological measures were significant. A statistical model distinguished typical from atypical dementia with a predictive power of 79%.

DISCUSSION: The DCQ is a better tool to detect atypical dementia than standard cognitive screening tests. Expanding the clinician's tool kit with the DCQ could reduce missed/delayed identification of atypical dementia and accelerate therapeutic intervention.

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