Children and adolescents with attention-deficit/hyperactivity disorder are at risk for many other mental disorders. About half of those with attention-deficit/hyperactivity disorder also have oppositional or conduct disorder, and about a fourth have an anxiety disorder. As many as one-third have depression, and about one-fifth have a learning disability. Sometimes children or adolescents will have two or more of these disorders in addition to attention-deficit/hyperactivity disorder. Children with attention-deficit/hyperactivity disorder are also at risk for developing personality and substance abuse disorders when they are adolescents or adults.
Attention-deficit/hyperactivity disorder is a major reason that children are referred for mental health services. Boys are more likely to be referred for treatment than girls, in part, because many boys with attention-deficit/hyperactivity disorder also have conduct disorder. Although mental health and special education services for children and adolescents with attention-deficit/hyperactivity disorder cost millions of dollars each year, in the long run, underachievement and lost productivity can be more costly for them and their families.
