New Data on Autism Spectrum Disorder in 4-Year-Old Children

A young boy sitting at his preschool desk

CDC scientists published a report on the prevalence and characteristics of autism spectrum disorder (ASD) among 4-year-old children. This report is based on information from the Early Autism and Developmental Disabilities Monitoring (ADDM) Network. Early ADDM is a subset of the broader ADDM Network, which has been doing ASD surveillance among 8-year-old children since 2000.