Nearly 1 million children potentially misdiagnosed with ADHD, study finds - 0 views
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These children are significantly more likely than their older classmates to be prescribed behavior-modifying stimulants such as Ritalin, said Todd Elder, whose study will appear in a forthcoming issue of the Journal of Health Economics.
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Such inappropriate treatment is particularly worrisome because of the unknown impacts of long-term stimulant use on children's health, Elder said.
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Elder said the "smoking gun" of the study is that ADHD diagnoses depend on a child's age relative to classmates and the teacher's perceptions of whether the child has symptoms.
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The results – both from individual states and when compared across states – were definitive. For instance, in Michigan – where the kindergarten cutoff date is Dec. 1 – students born Dec. 1 had much higher rates of ADHD than children born Dec. 2. (The students born Dec. 1 were the youngest in their grade; the students born Dec. 2 enrolled a year later and were the oldest in their grade.) Thus, even though the students were a single day apart in age, they were assessed differently simply because they were compared against classmates of a different age set, Elder said.
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"Nearly 1 million children in the United States are potentially misdiagnosed with attention deficit hyperactivity disorder simply because they are the youngest - and most immature - in their kindergarten class, according to new research by a Michigan State University economist." At Lab Spaces on August 17, 2010.