How common is ADHD?

How common is ADHD?

About 11% of children between the ages of four and 17 have ADHD. Symptoms of ADHD typically first appear between the ages of three and six years old. The average age of ADHD diagnosis is seven years old. In children, it’s three times more common in young boys than girls.

ADHD isn’t just a childhood disorder. About 4% of American adults over the age of 18 contend with ADHD behaviors on a daily basis. In adulthood, it’s diagnosed equally between males and females.