Autism Diagnoses in US Kids Jump 30 Percent

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Up to 1.5 percent, or one in 68 U.S. children on average, may have autism, according to new estimates released today by the Centers for Disease Control and Prevention.

This new estimate means that about 30 percent more children may have autism spectrum disorders (ASD) than previously thought. A 2012 report from the CDC estimated that one in 88 children have the condition.

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The new report also found that more children with autism may have a high IQ than previously thought. Although some children with the condition have severe intellectual challenges, the new report estimates that about 46 percent of children with autism have average or above average intellectual ability (an IQ above 85), compared with the estimate of one-third of children with autism a decade ago.

For the report, researchers reviewed records from the CDC's Autism and Developmental Disabilities Monitoring (ADDM) Network. They pulled data from 11 community centers where children with developmental disabilities are educated, diagnosed or treated.

The sample of children used in this report is not nationally representative, and the results may not generalize to the entire United States. However it is the most detailed picture, and the best estimate available, the researchers said. [Psychiatry's New Guide: 6 Things You Should Know]

The results showed a wide range in the number of children diagnosed with ASD based on their location, ranging from one in 175 children in Alabama to one in 45 children in New Jersey.

This difference is partly explained by the way data was gathered, for example, in Alabama, researchers had limited access to children's educational record.

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