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Abikoff noted the CDC study is based on parents saying that a health care provider told them their child had ADHD, but it's not known who the health-care provider was or how thorough the assessment was.
ADHD diagnosis is a matter of expert opinion. There's no blood test or brain-imaging exam for the condition. Sometimes reading disabilities or other problems in the classroom cause a teacher or others to mistakenly think a child has ADHD, he said.
The CDC study noted an increase in diagnoses was seen in kids of all races and family income levels, and across all regions of the country except the West. The survey covered 73,000 children.
Of those who had ADHD at the time of the latest survey, about half had a mild form.
The research appears in the CDC publication, Morbidity and Mortality Weekly Report.
Copyright 2010 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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