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 The concept of ADHD first emerged in the USA and from there it spread to all parts of the world during the late 1950s, to be become a global phenomenon

 Recent studies have concluded that the global rate of ADHD is approximately 5%

 However, there are significant differences in how ADHD has been diagnosed and the support that is available in different countries and regions. This is largely due to variable cultural factors and how conditions associated with behavioural and educational challenges are viewed across the globe