Br J Psychiatry. 2009 Jun;194(6):500-9.

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

Baron-Cohen S, Scott FJ, Allison C, Williams J, Bolton P, Matthews FE, Brayne C. University of Cambridge, Autism Research Centre, Department of Psychiatry, Douglas House, 18b Trumpington Road, Cambridge CB2 8AH, UK. sb205@cam.ac.uk.

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.

PMID: 19478287 [PubMed - in process]

Comments (0)

Subscribe to this comment's feed

Show/hide comments

Show/hide comment form

Name

Email

Comment

smaller | bigger

Subscribe via email (registered users only)

I have read and agree to the Terms of Usage.

Add Comment