Epidemiology of vascular dementia: some results despite research limitations.

Vascular dementia, the second most common dementia after Alzheimer disease, has great potential for prevention and treatment. Epidemiological data provide the basis for planning primary prevention and clinical trials. Nevertheless, general consensus on disease definition and diagnostic criteria are still not well defined. Despite these limitations, some results from the Kungsholmen project, an epidemiological longitudinal study of people 75 years and older, are presented here.