A recent study by investigators from Harvard University and Massachusetts General Hospital found that children with August birthdays in school systems that have a September 1st grade cutoff are up to 30% more likely to be diagnosed with ADHD.
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Mass General researcher Timothy Wilens, PhD, has found that the earlier children with attention deficit hyperactivity disorder (ADHD) receive treatment with stimulants, the less likely they are to use marijuana or develop a substance use disorder (SUD).