Predicting the prevalence of mental retardation in individual catchment areas.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000175:diagnosis / Q000453:epidemiology*; D007360:Intelligence; D008875:Middle Aged; D014481:United States