A family history study of neuropsychiatric disorders in the adult siblings of autistic individuals.

J Am Acad Child Adolesc Psychiatry

Department of Psychiatry, Johns Hopkins University, School of Medicine, Baltimore, Maryland.

Published: March 1990

The family history method was used to obtain developmental, social, and psychiatric histories on the 67 adult siblings of 37 autistic probands. Two of 67 siblings (3.0%) were autistic, three siblings (4.4%) had severe social dysfunction and isolation, 10 (15%) had cognitive disorders, and 10 (15%) had received treatment for affective disorder. This study is the first to investigate the frequency of disorders in the adult siblings of autistic probands. These results suggest aggregation of a variety of neuropsychiatric disorders in the siblings of autistic individuals.

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http://dx.doi.org/10.1097/00004583-199003000-00004DOI Listing

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