The UCLA-University of Utah epidemiologic survey of autism: prevalence.
The authors conducted an epidemiologic survey in Utah using a four-level ascertainment system, blind current diagnostic assessments, and DSM-III criteria. Of 483 individuals ascertained, 241 were diagnosed as having autism. The best estimate for the prevalence rate was 4 per 10,000 population. Autism was not associated with parental education, occupation, racial origin, or religion. Sixty-six percent of the autistic subjects scored below 70 on standardized IQ tests, and females scored proportionately lower than males. Twenty (9.7%) of 207 families had more than one autistic sibling, which supports the authors' previous finding that there may be a familial subtype of autism.
Ritvo
E R
ER
Division of Mental Retardation and Child Psychiatry, University of California School of Medicine, Los Angeles.
Freeman
B J
BJ
Pingree
C
C
Mason-Brothers
A
A
Jorde
L
L
Jenson
W R
WR
McMahon
W M
WM
Petersen
P B
PB
Mo
A
A
Ritvo
A
A
D000293:Adolescent; D000328:Adult; D001321:Autistic Disorder / Q000453:epidemiology* / Q000235:genetics / Q000523:psychology; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D004522:Educational Status; D005006:Ethnicity; D005260:Female; D006801:Humans; D007360:Intelligence; D008297:Male; D009790:Occupations; D010290:Parents; D012067:Religion; D012737:Sex Factors; D012923:Social Class; D014589:Utah