title: Ethnicity, geographic locale, age, sex, and urban-rural residence as variables in the prevalence of mild retardation.
abstract: The Wechsler-Intelligence Scale for Children-Revised (WISC-R) was administered to 950 of a stratified random sample of 1,040 children in Pima County, Arizona. The sample was stratified for ethnicity (Anglo, Black, Mexican-American, and Papago Indian), urban-rural residence, sex, and grade level. The three WISC-R IQ scores and cutoff points of 69 and 75 were used in comparisons of prevalence of mild mental retardation. This prevalence was significantly related to ethnicity and geographic locale. Sex, urban-rural residence, and grade level were not related to prevalence.
mesh_terms: D000124:Achievement; D000367:Age Factors; D001130:Arizona; D002648:Child; D004522:Educational Status; D005006:Ethnicity; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000453:epidemiology*; D008297:Male; D012424:Rural Population; D012737:Sex Factors; D014505:Urban Population; D014888:Wechsler Scales