ERIC Number: EJ1141275
Record Type: Journal
Publication Date: 2017-Jun
Abstractor: As Provided
Brief Report: Estimated Prevalence of a Community Diagnosis of Autism Spectrum Disorder by Age 4 Years in Children from Selected Areas in the United States in 2010--Evaluation of Birth Cohort Effects
Soke, Gnakub N.; Maenner, M. J.; Christensen, D.; Kurzius-Spencer, M.; Schieve, L. A.
Journal of Autism and Developmental Disorders, v47 n6 p1917-1922 Jun 2017
We compared early-diagnosed autism spectrum disorder (ASD) (defined as diagnosis by age 4 years) between the 2002 and 2006 birth cohorts, in five sites of the Autism and Developmental Disabilities Monitoring Network. In the 2002 cohort, the prevalence/1000 of early-diagnosed ASD was half the 8-year-old prevalence (7.2 vs. 14.7, prevalence ratio [PR] 0.5 [0.4-0.6]). Overall, the prevalence of early-diagnosed ASD did not differ between birth cohorts (PR 1.1 [0.9-1.3]). However, in three sites with complete case ascertainment, the prevalence of early-diagnosed ASD was higher for those born in 2006 versus 2002 (PR 1.3 [1.1-1.5]), suggesting possible improvement in early identification. The lack of change in two sites may reflect less complete case ascertainment. Studies in more recent cohorts are needed.
Descriptors: Autism, Pervasive Developmental Disorders, Incidence, Clinical Diagnosis, Preschool Children, Cohort Analysis, Comparative Analysis, Disability Identification, Birth
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A
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