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Sex differences in higher functioning people with autism

J D McLennan1, C Lord, E Schopler

  • 1Department of Psychiatry, University of North Carolina, Chapel Hill.

Journal of Autism and Developmental Disorders
|June 1, 1993
PubMed
Summary
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Males with autism showed more severe social development challenges than females. This study explored sex differences in autism severity, finding distinctions primarily in early social measures.

Area of Science:

  • Neurodevelopmental disorders
  • Autism Spectrum Disorder research
  • Sex differences in medicine

Background:

  • Autism Spectrum Disorder (ASD) incidence shows known sex disparities.
  • Limited research addresses sex-based differences in ASD symptom severity.
  • Understanding these differences is crucial for tailored interventions.

Purpose of the Study:

  • To investigate sex differences in the severity of autism spectrum disorder features.
  • To compare autistic males and females with matched intelligence and age.
  • To identify specific areas where sex-based severity differences may exist.

Main Methods:

  • Utilized the Autism Diagnostic Interview (ADI) for assessment.
  • Compared a cohort of 21 females with autism to 21 males with autism.

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  • Ensured participants had equivalent nonverbal IQs greater than 60.

    • Main Results:

    • Males were rated as having more severe autism features than females.
    • These differences were concentrated in measures of early social development.
    • No significant sex differences in severity were found in other assessed areas.

    Conclusions:

    • Autistic males may exhibit greater severity in early social deficits compared to autistic females.
    • Findings suggest specific domains of autism may be differentially affected by sex.
    • Further research is needed to explore the implications of these sex-based variations.