ADHD (Attention-Deficit/Hyperactivity Disorder) is one of the most commonly misunderstood conditions. But awareness can change lives. What the numbers tell us (U.S.): 1 in 10 children is diagnosed with ADHD (CDC). More than 8 million adults live with ADHD (NIMH). Yet, only about 20% of adults with ADHD receive treatment (CHADD). ADHD IS: