Monday, September 8, 2008

Prevalence of Autism

The CDC estimates that 1 in every 150 children has autism spectrum disorder (ASD). The CDC based this figure on a study released in 2007 . The study looked at eight year old children across 14 study sites. At six sites the children were born in 1992 and evaluated in 2000, at the other eight sites the children were born in 1994 and evaluated in 2002.

Another US study published in 2003 estimated autism prevalence at 3.4 per 1000 (95% confidence interval [CI], 3.2-3.6), which is about 1 in 294.

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