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Am J Psychiatry. 1989 Feb;146(2):194-9.

The UCLA-University of Utah epidemiologic survey of autism: prevalence.

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Division of Mental Retardation and Child Psychiatry, University of California School of Medicine, Los Angeles.


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.

[Indexed for MEDLINE]

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