Demographic Characteristics of Individuals with Autism Spectrum Disorder by Study Sample.

Abbreviations: ASD, Autism Spectrum Disorder; AGRE, the Autism Genetic Resource Exchange; SSC, the Simons Simplex Collection; AC, the Autism Consortium; NSCH, the 2007 National Survey of Children’s Health; Wt. %, weighted percentage; N/A: not applicable or data not unavailable.aDiagnosis based on the Autism Diagnostic Interview, Revised (ADI-R) cut-off scores for autism and ASD (Risi et al. 2006).bUnweighted number of children.Values may not add up to total due to missing data.