Among the sites, there were large differences. Prevalence ranged from 9.7 per 1,000 children who were 8 years old in Texas (Laredo) to 53.1 in California. These differences are likely due to “differences in availability of services for early detection and evaluation and diagnostic practices,” the CDC and network researchers wrote.
For instance, California—the site with the highest prevalence among 8-year-olds and also 4-year-olds—has a local initiative called the Get SET Early model. “As part of the initiative, hundreds of local pediatricians have been trained to screen and refer children for assessment as early as possible, which could result in higher identification of ASD, especially at early ages,” the
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