Nine out of 10 young children with moderate to severe attention-deficit hyperactivity disorder (ADHD) continue to experience serious, often severe symptoms and impairment long after their original diagnoses and, in many cases, despite treatment, according to a study, published online Feb. 11 in the Journal of the American Academy of Child & Adolescent Psychiatry.
The study is the largest long-term analysis to date of preschoolers with ADHD, the investigators say, and sheds much-needed light on the natural course of a condition that is being diagnosed at an increasingly earlier age.
The study shows that nearly 90 percent of the 186 youngsters followed continued to struggle with ADHD symptoms six years after diagnosis. Children taking ADHD medication had just as severe symptoms as those who were medication-free, the study found.

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