ADHD has been thought of as a disorder for males since the diagnosis was invented, but that stereotype is inaccurate. And it is changing, according to the results of a very large, population-based study of children aged 5-17 years old, in which parents surveyed from 2003 to 2011 reported a much greater rise in ADHD diagnoses among their daughters than among their sons. Specifically, reported diagnoses increased 55 percent for girls compared to 40 percent for boys according to the study, published last month in the Journal of Clinical Psychiatry.