There are two noticeable differences as the population which had ADHD as children matures. On the one hand, for around 50% of boys, the symptoms decline significantly as they pass into adulthood. On the other hand, there is actually an increase in females diagnosed, and they are found mainly to have predominantly Inattentive ADHD. The generally accepted explanation for this is that the symptoms of the inattentive disorder are less apparent in girls than in boys (which means it goes undetected), and the ratio of boys to girls is usually 3:1 or even higher. By the time the children pass through teenage years into adulthood, the ratio becomes closer to 1:1. This is both because fewer men are affected (or the symptoms are milder and become manageable without recourse to medication and treatment) and because more and more women are being diagnosed with the disorder.