Dementia Subtypes in China

Abstract
Reported prevalences of Alzheimer disease (AD) and vascular dementia (VaD) in east Asia differ from those in Western countries.1-7 Whereas AD predominates in Europe and North America, an excess of VaD over AD has been observed in Japan and northern China.4,6 Although methodologic factors such as completeness of case ascertainment could explain this variation, some investigators believe that the underlying risk factors for AD and VaD differ in east Asia.7,8