Cited by 918Autism Spectrum Disorder ResearchChild Nutrition and Feeding IssuesFamily and Disability Support Research

Prevalence of autism-spectrum conditions: UK school-based population study

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Baron-Cohen, Simon, Scott, Fiona J., Allison, Carrie, Williams, Joanna, Bolton, Patrick, Matthews, Fiona E., Brayne, Carol·2009·British Journal of Psychiatry

Abstract

Background: Recent reports estimate the prevalence of autism-spectrum conditions in the UK to be 1%. Aims: To use different methods to estimate the prevalence of autism-spectrum conditions, including previously undiagnosed cases, in Cambridgeshire. Method: We carried out a survey of autism-spectrum conditions using the Special Educational Needs (SEN) register. A diagnosis survey was distributed to participating schools to be handed out to parents of all children aged 5–9 years. The mainstream primary school population was screened for unknown cases. Results: The prevalence estimates generated from the SEN register and diagnosis survey were 94 per 10 000 and 99 per 10 000 respectively. A total of 11 children received a research diagnosis of an autism-spectrum condition following screening and assessment. The ratio of known:unknown cases is about 3:2 (following statistical weighting procedures). Taken together, we estimate the prevalence to be 157 per 10 000, including previously undiagnosed cases. Conclusions: This study has implications for planning diagnostic, social and health services.

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  • The prevalence of ASD worldwide has increased in recent decades.

    “The prevalence of ASD worldwide has increased in recent decades [71, 78, 92].”

    From The global prevalence of autism spectrum disorder: a comprehensive systematic review and meta-analysis. (2022) · cites this paper as [78]

    The opening prevalence discussion (page not provided) says estimates for autism-spectrum conditions rose over four decades. It attributes much of the rise to changes in detection, methodology and diagnostic criteria, and cautions that studies cannot be directly compared; it does not establish that actual ASD prevalence increased worldwide. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • ASD is diagnosed three to four times more frequently in males than in females.

    “Autism spectrum disorder (ASD) is diagnosed three to four times more frequently in males than in females.1, 2, 3”

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Authors
Baron-Cohen, S., Scott, F. J., Allison, C., Williams, J., Bolton, P., Matthews, F. E., & Brayne, C.
Affiliations
University of Cambridge (GB)
Venue
British Journal of Psychiatry
Published
2009-06
Volume
194
Issue
6
Pages
500-509
ISSN
  • 0007-1250 (ISSN-L)
  • 1472-1465
OpenAlex
W2161063401
Cited by
918
References
45
Citations by year
2026: 10 · 2025: 24 · 2024: 21 · 2023: 41 · 2022: 43 · 2021: 60 · 2020: 58 · 2019: 53 · 2018: 63 · 2017: 60 · 2016: 65 · 2015: 66 · 2014: 86 · 2013: 91 · 2012: 73
FWCI
28.65
Type
journal article
Language
en
Open access
Locations
  • The British Journal of Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Repository@Hull (Worktribe) (University of Hull) (submittedVersion, cc-by)
  • Repository@Hull (Worktribe) (University of Hull) (submittedVersion)
  • Research Portal (King's College London) (submittedVersion)
Funders
  • South London and Maudsley NHS Foundation Trust
  • National Institute for Health and Care Research
  • King's College London
  • Medical Research Council
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Health Sciences › Medicine › Psychiatry and Mental health › Child Nutrition and Feeding Issues
  • Social Sciences › Psychology › Clinical Psychology › Family and Disability Support Research
Keywords
autism spectrum disorder, prevalence, undiagnosed cases, school-based screening, elementary school students, Cambridgeshire
MeSH terms
Autistic Disorder, Child, Child, Preschool, England, Female, Humans, Male, Parents, Surveys and Questionnaires, Prevalence

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