ADHD has long-term adverse affects on success at school, work, and in social relationships. As they grow older, children with untreated ADHD who have a coexisting conduct disorder often experience drug abuse, antisocial behavior, teenage pregnancy, and injuries of all sorts. There is no known cure. There are 1 to 2 cases of autism per 1,000 people. These disorders develop in childhood and are generally apparent by age three.
Autism is three to four times more common in boys than girls.
Girls with the disorder, however, tend to have more severe symptoms and lower intelligence. These disorders present families with financially and emotionally costly challenges over the lifespan of their affected children. About 60 percent of adults with autism will require continued care throughout their lives.