Attention deficit hyperactivity disorder adhd national institute of mental health attention deficit hyperactivity disorder among children aged 5 17 years in the united states 1998 2009 national center for health statistics attention deficit hyperactivity disorder adhd data and statistics centers for disease control and prevention. Attention deficit hyperactivity disorder adhd is a chronic condition it mainly affects children but can also affect adults it can have an impact on emotions behaviors and the ability to . Attention deficit hyperactivity disorder adhd is a problem of not being able to focus being overactive not being able control behavior or a combination of these for these problems to be diagnosed as adhd they must be out of the normal range for a persons age and development causes
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