ADHD occurs in people of every level of intelligence.
ADHD tends to run in families, and there is an association with a family history of
alcoholism and / or depression.
There is some suggestion clinically that asthma may be more prevalent in ADHD children.
ADHD children often show considerable ability with artistic endeavors, but may have difficulty
forming symbols ( writing) unless "drawing", going very slowly and precisely.
ADHD is much more commonly diagnosed in the United States than in Europe, and the stimulant
medications are used vastly more in the United States as an intervention strategy.