Similar to hyperkinetic disorder, neurodevelopmental type in which there are significant problems of attention and/or hyperactivity and acting impulsively that are not appropriate for a person's age. These symptoms must begin by age six to twelve and be present for more than six months for a diagnosis to be made. In school-aged individuals the lack of focus may result in poor school performance.
Despite being the most commonly studied and diagnosed disorder in children and adolescents, the cause in the majority of cases is unknown. It affects about 6 to 7 percent of children. Rates are similar between countries and depend mostly on how it is diagnosed. ADHD is approximately three times more frequent in boys than in girls. About 30 to 50 percent of people diagnosed in childhood continue to have symptoms into adulthood and between 2 and 5 percent of adults have the condition.
The condition can be difficult to tell. Attention deficit hyperactivity disorder (ADHD, similar to hyperkinetic disorder, neuron-developmental type in which there are significant l apart from other disorders as well as that of high normal activity. ADHD management usually involves some combination of counseling, lifestyle changes, and medications. Medications are only recommended as a first-line treatment in children who have severe symptoms and may be considered for those with moderate symptoms who either refuse or fail to improve with counseling. Long-term effects of medications are not clear and they are not recommended in preschool aged children. Adolescents and adults tend to develop coping skills, which make up for some or all of their impairments.