A prevalence survey of Parkinson's disease and other movement disorders in the People's Republic of China
S. C. Li, B. S. Schoenberg, C. C. Wang, X. M. Cheng, D. Y. Rui, C. L. Bolis and D. G. Schoenberg
A door-to-door survey was conducted in six cities of the People's Republic
of China. A total of 63,195 individuals were sampled during 1983 to
determine the prevalence of major neurologic disorders. The survey involved
a complete census, followed by a pretested interview and brief screening
examination with a high level of sensitivity for detecting individuals with
frequently occurring neurologic diseases, including movement disorders.
Subjects with abnormal responses or findings were examined by a
neurologist. There was 100% cooperation among the study subjects.
Twenty-eight individuals alive on prevalence day (Jan 1, 1983) were
identified as having Parkinson's disease, yielding an age-adjusted (to the
1960 US population) prevalence ratio of 57 per 100,000 population. All
subjects were older than the age of 50 years. After the fifth decade of
life, the age-specific prevalence ratios increased with age.
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