The Centers for Disease Control say that the number of children diagnosed with attention deficit hyperactivity disorder is climbing. As a result, more children are on medication to treat it than even before. 

According to the CDC, nearly 67 percent of children currently diagnosed with ADHD are taking medication for it, marking a 28 percent jump from 2007 to 2011. Furthermore, 11 percent of children in the U.S. have been diagnosed with ADHD at some point,. A decade prior, the number was 7.8 percent. 

There are both gender and regional differences in diagnosis rates. ADHD is more common among high school-age boys, and 15 percent of kids in Arkansas were diagnosed with the condition, compared to 9 percent in Maryland and 5 percent in Nevada. 

NPR notes that since parents were first asked about their children and ADHD in 1997, there number of parent-reported diagnoses have increased. Still, the CDC won't specify whether that's a result of the number of children who have the condition, or just the number of diagnoses.

[via NPR]