What is Epidemiology of attention deficit hyperactive disorder?

Attention-Deficit/Hyperactivity Disorder is estimated to affect about 6 to 7 percent of people aged 18 and under when diagnosed via the DSM-IV criteria. Hyperkinetic disorder when diagnosed via the ICD-10 criteria give rates of between 1 and 2 percent in this age group.

Children in North America appear to have a higher rate of ADHD than children in Africa and the Middle East - however, this may be due to differing methods of diagnosis used in different areas of the world. If the same diagnostic methods are used rates are more or less the same between countries.