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Shi-chuo Li, MD; Bruce S. Schoenberg, MD, DrPH; Chung-cheng Wang, MD; Xue-ming Cheng, MD; De-yuan Rui, MD; C. L. Bolis, MD; Devera G. Schoenberg, MS

Arch Neurol. 1985;42(7):655-657.

Abstract
• 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.

Author Affiliations
From the Beijing Neurosurgical Institute (Drs Li, Wang, and Cheng), Harbin Medical University, Harbin (Dr Rui), People's Republic of China; the Neuroepidemiology Branch, National Institute of Neurological and Communicative Disorders and Stroke, National Institutes of Health, Bethesda, Md (Drs Li and Schoenberg); and the Neurosciences Program, Division of Mental Health, World Health Organization, Geneva (Dr Bolis). Mrs Schoenberg is a free-lance editor specializing in the neurosciences, Bethesda, Md.

Footnotes
Accepted for publication Jan 20,1985.

Reprint requests to Neuroepidemiology Branch, NINCDS, National Institutes of Health, Federal Bldg, Room 804, Bethesda, MD 20205 (Dr Schoenberg).

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