Journal of Autism and Developmental Disorders

, Volume 41, Issue 12, pp 1601–1608

A Comparison of Autism Prevalence Trends in Denmark and Western Australia

  • Erik T. Parner
  • Poul Thorsen
  • Glenys Dixon
  • Nicholas de Klerk
  • Helen Leonard
  • Natasha Nassar
  • Jenny Bourke
  • Carol Bower
  • Emma J. Glasson
Original paper

DOI: 10.1007/s10803-011-1186-0

Cite this article as:
Parner, E.T., Thorsen, P., Dixon, G. et al. J Autism Dev Disord (2011) 41: 1601. doi:10.1007/s10803-011-1186-0

Abstract

Prevalence statistics for autism spectrum disorders (ASD) vary widely across geographical boundaries. Some variation can be explained by diagnostic methods, case ascertainment and age at diagnosis. This study compared prevalence statistics for two distinct geographical regions, Denmark and Western Australia, both of which have had population-based registers and consistent classification systems operating over the past decade. Overall ASD prevalence rates were higher in Denmark (68.5 per 10,000 children) compared with Western Australia (51.0 per 10,000 children), while the diagnosis of childhood autism was more prevalent in Western Australia (39.3 per 10,000 children) compared with Denmark (21.8 per 10,000 children). These differences are probably caused by local phenomena affecting case ascertainment but influence from biological or geographical factors may exist.

Keywords

Autism Autism spectrum disorders Prevalence Diagnosis Denmark Western Australia 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Erik T. Parner
    • 1
  • Poul Thorsen
    • 2
  • Glenys Dixon
    • 3
    • 6
  • Nicholas de Klerk
    • 3
  • Helen Leonard
    • 3
  • Natasha Nassar
    • 3
    • 4
  • Jenny Bourke
    • 3
  • Carol Bower
    • 3
  • Emma J. Glasson
    • 3
    • 5
    • 7
  1. 1.Institute of Public Health, Department of BiostatisticsUniversity of AarhusAarhusDenmark
  2. 2.Department of Gynecology and ObstetricsLillebaelt HospitalKoldingDenmark
  3. 3.Telethon Institute for Child Health Research, Centre for Child Health ResearchThe University of Western AustraliaPerthAustralia
  4. 4.Kolling Institute for Medical ResearchUniversity of SydneySydneyAustralia
  5. 5.School of Population HealthThe University of Western AustraliaPerthAustralia
  6. 6.School of SurgeryThe University of Western AustraliaPerthAustralia
  7. 7.School of Population Health, M431The University of Western AustraliaCrawleyAustralia

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