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J Child Psychol Psychiatry. 1990 Sep;31(6):921-34.

Autism under age 3 years: a clinical study of 28 cases referred for autistic symptoms in infancy.

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Department of Child & Adolescent Psychiatry, Child Neuropsychiatry Centre, Göteborg, Sweden.


Twenty-eight children referred with a preliminary diagnosis of autistic disorder under age 3 yrs were extensively examined from the neuropsychiatric point of view and followed up for several months to several years. A diagnosis of autistic disorder was confirmed in 75% of the cases. A variety of associated medical conditions was identified. It was concluded that autism can be diagnosed in a substantial proportion of cases before age 3 yrs and that the neurobiological background is similar to that seen in older autistic children.

[Indexed for MEDLINE]

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