Abstract
A higher educational level has consistently been associated with a lower incidence of dementia. However, in the current issue of the Journal, Glymour et al. (Am J Epidemiol. 2012;175(8):750-759.) present findings that are in agreement with other research in showing a lack of association between educational level and cognitive decline in the elderly. These findings are not inconsistent with the hope, yet unproven, that persons might reduce their risk of dementia by engaging in cognitively stimulating activities.