[Principal component analysis and integral methods of cerebral vascular hemodynamic parameters].

Objective: To establish a predicting model for stroke according to cerebral vascular hemodynamic indexes and major risk factors of stroke.

Methods: Participants selected from a stroke cohort with 25,355 population in China. The first step was to carry out principal component analysis using CVHI.

Prevalence of dementia in China.

To obtain prevalence estimates of dementia in China, an analysis of 17 studies published in Chinese from 1990-1999 was carried out. The prevalence rates for the population aged 60 years and older were 1.26% for Alzheimer's disease (AD) and 0.