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The prevalence of autism spectrum disorders in toddlers: a population study of 2-year-old Swedish children.

Journal article
Authors Gudrun Nygren
Mats Cederlund
Eva Sandberg
Fredrik Gillstedt
Thomas Arvidsson
I Carina Gillberg
Gunilla Westman Andersson
Christopher Gillberg
Published in Journal of Autism and Developmental Disorders
Volume 42
Issue 7
Pages 1491-1497
ISSN 0162-3257
Publication year 2012
Published at Gillberg Neuropsychiatry Centre
Pages 1491-1497
Language en
Links dx.doi.org/10.1007/s10803-011-1391-...
Subject categories Child and adolescent psychiatry

Abstract

Autism Spectrum Disorder (ASD) is more common than previously believed. ASD is increasingly diagnosed at very young ages. We report estimated ASD prevalence rates from a population study of 2-year-old children conducted in 2010 in Gothenburg, Sweden. Screening for ASD had been introduced at all child health centers at child age 21/2 years. All children with suspected ASD were referred for evaluation to one center, serving the whole city of Gothenburg. The prevalence for all 2-year-olds referred in 2010 and diagnosed with ASD was 0.80%. Corresponding rates for 2-year-olds referred to the center in 2000 and 2005 (when no population screening occurred) were 0.18 and 0.04%. Results suggest that early screening contributes to a large increase in diagnosed ASD cases.

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