Harvard Health Blog

Younger kindergarteners more likely to be diagnosed with ADHD

By: Claire McCarthy, MD, Faculty Editor, Harvard Health Publishing In a class of kindergarteners, a child born in August is about 30% more likely to be diagnosed with attention deficit hyperactivity disorder (ADHD), and 25% more likely to be treated for it, than a child born in September if you have to be 5 years old by September 1st to start kindergarten. …

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