Prevalence of autism in an urban population of adults with severe intellectual disabilities--a preliminary study
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Your vote was cast
Thank you for your feedback
Thank you for your feedback
MetadataShow full item record
CitationJ Intellect Disabil Res. 2010, 54(8):727-35
AbstractBACKGROUND: Research on the prevalence of autism in Iceland has indicated that one possible explanation of fewer autism cases in older age groups was due to an underestimation of autism in individuals with intellectual disabilities (IDs). The present study systematically searched for autism cases in the adult population of individuals with severe ID living in the city of Reykjavik, Iceland. METHODS: Potential participants (n = 256) were recruited through the Regional Office for the Affairs of the Handicapped in Reykjavik. First, a screening tool for autism was applied, followed by the Childhood Autism Rating Scale and finally the Autism Diagnostic Interview-Revised (ADI-R). RESULTS: The point prevalence of severe ID was 3.7/1000 (95% CI 3.2-4.1) with a male-female ratio of 1.2:1. Participation rate in the study was 46.5%. Participants were younger than non-participants and more often residents of group homes. The prevalence of autism was 21% (25/119) (95% CI 14.7-29.2) with a male-female ratio of 1.8:1. Of the individuals with autism, 10/25 (40%) were verbal according to the ADI-R definition, and 18/25 (72%) had active epilepsy and/or other neurological conditions and handicaps. CONCLUSION: The study identified twice the number of autism cases than those previously recognised within the service system. Autism is a prevalent additional handicap in individuals with severe ID, which should always be considered in this population. There are indications that the estimated prevalence of autism found should be considered minimal.
DescriptionTo access publisher full text version of this article. Please click on the hyperlink in Additional Links field
- Social skills: differences among adults with intellectual disabilities, co-morbid autism spectrum disorders and epilepsy.
- Authors: Smith KR, Matson JL
- Issue date: 2010 Nov-Dec
- Autism spectrum disorders in children with a history of infantile spasms: a population-based study.
- Authors: Saemundsen E, Ludvigsson P, Rafnsson V
- Issue date: 2007 Sep
- Epilepsy in young adults with autism: a prospective population-based follow-up study of 120 individuals diagnosed in childhood.
- Authors: Danielsson S, Gillberg IC, Billstedt E, Gillberg C, Olsson I
- Issue date: 2005 Jun
- Autism and intellectual disability: a study of prevalence on a sample of the Italian population.
- Authors: La Malfa G, Lassi S, Bertelli M, Salvini R, Placidi GF
- Issue date: 2004 Mar
- Emotional and behavioural adjustment in siblings of children with intellectual disability with and without autism.
- Authors: Petalas MA, Hastings RP, Nash S, Lloyd T, Dowey A
- Issue date: 2009 Sep