[article] 
inJournal of Autism and Developmental Disorders > 37-10 (November 2007) . - p.1941-1948

Titre :	Trends in Special Education Code Assignment for Autism: Implications for Prevalence Estimates
Type de document :	Texte imprimé et/ou numérique
Auteurs :	Hélène OUELLETTE-KUNTZ, Auteur ; Helen COO, Auteur ; Jennifer E. V. LLOYD, Auteur ; Liza KASMARA, Auteur ; Jeanette J. A. HOLDEN, Auteur ; M. E. Suzanne LEWIS, Auteur
Année de publication :	2007
Article en page(s) :	p.1941-1948
Langues :	Anglais (eng)
Mots-clés :	Autism autistic-disorder prevalence trends special-education Edudata-Canada British-Columbia-Ministry-of-Education
Index. décimale :	PER Périodiques
Résumé :	There is considerable controversy over reasons for observed increases in the prevalence of autism spectrum disorders. We examined trends in British Columbia education database coding of children with autism from 1996 to 2004. There was a significant linear increase in autism prevalence. The proportion of children identified by age 6 increased significantly from 1996 to 1999. When we calculated prevalence assuming onset prior to age 3, previously unidentified cases, particularly among girls in 1996 and 1997, accounted for substantial increases in estimated prevalence. The magnitude of under-identification decreased from 1996 to 2000, and rose slightly in 2001. Analyses of prevalence trends must take into account effects of earlier age at identification and inclusion of previously undetected cases on prevalence estimates.
En ligne :	http://dx.doi.org/10.1007/s10803-006-0326-4
Permalink :	https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=219

[article] Trends in Special Education Code Assignment for Autism: Implications for Prevalence Estimates [Texte imprimé et/ou numérique] / Hélène OUELLETTE-KUNTZ, Auteur ; Helen COO, Auteur ; Jennifer E. V. LLOYD, Auteur ; Liza KASMARA, Auteur ; Jeanette J. A. HOLDEN, Auteur ; M. E. Suzanne LEWIS, Auteur . - 2007 . - p.1941-1948.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 37-10 (November 2007) . - p.1941-1948

Mots-clés :	Autism autistic-disorder prevalence trends special-education Edudata-Canada British-Columbia-Ministry-of-Education
Index. décimale :	PER Périodiques
Résumé :	There is considerable controversy over reasons for observed increases in the prevalence of autism spectrum disorders. We examined trends in British Columbia education database coding of children with autism from 1996 to 2004. There was a significant linear increase in autism prevalence. The proportion of children identified by age 6 increased significantly from 1996 to 1999. When we calculated prevalence assuming onset prior to age 3, previously unidentified cases, particularly among girls in 1996 and 1997, accounted for substantial increases in estimated prevalence. The magnitude of under-identification decreased from 1996 to 2000, and rose slightly in 2001. Analyses of prevalence trends must take into account effects of earlier age at identification and inclusion of previously undetected cases on prevalence estimates.
En ligne :	http://dx.doi.org/10.1007/s10803-006-0326-4
Permalink :	https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=219