What do the ADDM network results tell us about the prevalence of ASD in the United States?
Results from CDC’s ADDM network showed the average ASD prevalence among states participating in the project was 6.7 per 1,000 children in 2000 (6 sites) and 6.6 per 1,000 in 2002 (14 sites), or approximately 1in 150 children. Most sites identified between 5.2—7.6 per 1,000 8-year-old children with ASD in 2000 and 2002. There was some variation with ASD prevalence significantly lower in 1 site (3.3 in AL) and higher in 1 site (10.6 in NJ). Prevalence was stable from 2000 to 2002 in 4 of the 6 sites that participated in both surveillance years, but increased slightly in GA and significantly in WV, indicating the need for ongoing monitoring of prevalence over time. These data provide important information on the prevalence of ASD in areas of the United States and will be used to examine trends in the occurrence of these disabilities over time.
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