My understanding is that ADHD is an American phenomenon born out of the culture’s competitive attitude and general intolerance.
The prevalence of ADHD in Europe is about the same as it is in the U.S., roughly 1 and 20 children. In 2003, Stephen V. Faraone analyzed the findings of 50 studies around the world and concluded that the prevalence of ADHD was at least as high in non-U.S. countries as it was in this country. This was especially true when the DSM-IV was used to make the diagnosis.
Yes, but my understanding is that the diagnostic manual used to diagnosis ADHD in the U.S. is more permissive than the one used in Europe.