Cognitive reserve proxies
cognitive, social and physical activities
Participants completed the French versions of the Cognitive Activities Questionnaire (CAQ) [The CAQ assesses cognitive activities for different life periods: at age 6, age 12, age 18, age 40, and for the current period [The LEQ assesses complex mental activities (e.g., education, occupational complexity, cognitive, social and physical activities) across 3 life periods: young adulthood (13–30 years), mid-life (30–65 years) and late life (from 65 years to present date) [For both questionnaires, higher scores reflect greater engagement in cognitive and/or complex mental activities, therefore greater CR.