The changing prevalence and incidence of dementia over time — current evidence

Determining how the incidence and prevalence of dementia changes over time requires population-based studies that use consistent methods over time. In this Review, the authors discuss the results of 14 worldwide studies that have attempted this approach. The findings consistently indicate that the incidence and prevalence of dementia, at least in Western countries, is stable or declining. Dementia is an increasing focus for policymakers, civil...