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. 2016 Dec;209(6):498-503.
doi: 10.1192/bjp.bp.115.174649. Epub 2016 Jul 7.

Epidemiology of autism in adults across age groups and ability levels

Traolach S Brugha  1 , Nicola Spiers  2 , John Bankart  2 , Sally-Ann Cooper  2 , Sally McManus  2 , Fiona J Scott  2 , Jane Smith  2 , Freya Tyrer  2
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Free article

Epidemiology of autism in adults across age groups and ability levels

Traolach S Brugha et al. Br J Psychiatry. 2016 Dec.
Free article

Abstract

Background: The epidemiology of autism in adults has relied on untested projections using childhood research.

Aims: To derive representative estimates of the prevalence of autism and key associations in adults of all ages and ability levels.

Method: Comparable clinical diagnostic assessments of 7274 Adult Psychiatric Morbidity Survey participants combined with a population case-register survey of 290 adults with intellectual disability.

Results: The combined prevalence of autism in adults of all ages in England was 11/1000 (95% CI 3-19/1000). It was higher in those with moderate to profound intellectual disability (odds ratio (OR) = 63.5, 95% CI 27.4-147.2). Male gender was a strong predictor of autism only in those with no or mild intellectual disability (adjusted OR = 8.5, 95% CI 2.0-34.9; interaction with gender, P = 0.03).

Conclusions: Few adults with autism have intellectual disability; however, autism is more prevalent in this population. Autism measures may miss more women with autism.

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