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ADHD Diagnoses Seem to Have Increased on the Internet – Is It Really That Common?

How common is ADHD? Learn more about ADHD and why it seems more people have it than really do.

BySara Novak
(Image Credit: NDAB Creativity/Shutterstock) NDAB Creativity/Shutterstock

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According to the Centers for Disease Control and Prevention (CDC), around 11 percent of children in the U.S. have been diagnosed with Attention-Deficit/Hyperactivity Disorder (ADHD) – a developmental disorder caused by differences in brain structure, particularly an imbalance in dopamine and norepinephrine.

“ADHD is recognized as one of the more common neurobehavioral diagnoses,” says Dannah G. Raz, division chief of Developmental Pediatrics at Phoenix Children’s in Phoenix, Arizona.

Boys are 15 percent more likely to be diagnosed with the condition compared to girls, because they’re more likely to cause behavioral issues in class while girls are more likely to show inattention which impacts their school work but does not disrupt class, says Zishan Khan, a child, adolescent and adult psychiatrist at Mindpath Health in Frisco, Texas.

Only around 6 percent of adults have the condition, largely because when they were children, ADHD diagnoses were less common. While the number of ...

  • Sara Novak

    Sara Novak is a science journalist based in South Carolina. In addition to writing for Discover, her work appears in Scientific American, Popular Science, New Scientist, Sierra Magazine, Astronomy Magazine, and many more. She graduated with a bachelor’s degree in Journalism from the Grady School of Journalism at the University of Georgia. She's also a candidate for a master’s degree in science writing from Johns Hopkins University.

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