Survey of major neurologic disorders in a biracial United States population: the Copiah County Study.
To determine the prevalence of frequently occurring neurologic disorders in a biracial population, a survey of households and chronic care institutions was carried out for all residents of Copiah County, Mississippi. Along with a complete census, interviews were held using extensive questions about diagnoses, signs, and symptoms of neurologic disorders. More than 97% of eligible households participated, comprising 23,842 persons (49% black, 50% white, 1% other). Persons with responses suggesting one or more of these disorders were examined by a neurologist who used defined diagnostic criteria. Age-adjusted prevalence ratios for cerebral palsy, epilepsy, stroke, and severe dementia were somewhat higher in blacks than in whites, while the age-adjusted prevalence ratio for essential tremor was slightly higher in whites. For Parkinson's disease, there was no difference in age-adjusted prevalence ratios between the races.
D044383:Black People; D002547:Cerebral Palsy / Q000453:epidemiology; D002561:Cerebrovascular Disorders / Q000453:epidemiology; D003704:Dementia / Q000453:epidemiology; D004827:Epilepsy / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008922:Mississippi; D009422:Nervous System Diseases / Q000453:epidemiology*; D010300:Parkinson Disease / Q000453:epidemiology; D014202:Tremor / Q000453:epidemiology; D044465:White People; D001741:Black or African American