KEY FINDINGS
In 2011-2013, 9.5% of children aged 4-17 years were ever diagnosed with attention deficit hyperactivity disorder (ADHD). For those aged 4-5, prevalence was 2.7%, 9.5% for those aged 6-11, and 11.8% for those aged 12-17. Among all age groups, prevalence of ever diagnosed ADHD was more than twice as high in boys as girls. Among those aged 6-17, prevalence was highest among non-Hispan...