Prevalence: ADHD is one of the most common disorders of childhood. The global prevalence is around 5%.[12] In the US, the National Survey of Children's Health found an overall prevalence of 11% among children aged 4 to 17 years in 2011,[13] while the National Health Interview Study found an estimated 8% of US children aged 3 to 17 years had ADHD in 2010.[14]

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