Understanding ADHD -- the Basics
What Is Attention Deficit Hyperactivity Disorder?
Attention deficit hyperactivity disorder, or ADHD, is a condition characterized by persistent inattention, hyperactivity, and/or impulsivity. ADHD begins in childhood and persists into adulthood in the majority of cases.
ADHD is one of the most common mental health disorders diagnosed among children. It affects 3% to 7% of all children, perhaps as many as 2 million American kids. Two to four times more boys than girls are affected. On the average, at least one child in every classroom in the U.S. needs help for the disorder.