from 0.2% in the 65–70 years age group to 16%  in individuals 80 years and older. Within
3 months following stroke, 20%–30% of individuals are diagnosed with dementia. In neu-
ropathology series, the prevalence of vascular  dementia increases from 13% at age 70 years
to 44.6% at age 90 years or older, in comp arison with Alzheimer’s disease (23.6%–51%) and
combined vascular dementia and Alzheimer’s disease (2%–46.4%). Higher prevalence has