While methods vary, a majority of studies on the topic find significant demographic disparities in whose ADHD symptoms get missed or improperly diagnosed and treated. "Privilege plays a huge role in getting an ADHD diagnosis," said Dr. Tumaini Rucker Coker, an associate professor of pediatrics at the University of Washington School of Medicine who researches racial and ethnic inequities in childhood ADHD. "And on the other side of that privilege are all the disadvantages of not getting a diagnosis early on."