Prevalence and Incidence of ADHD

Prevalance of ADHD:

3.3 million children have ADD in the USA (NHIS-97); estimated 2 million American children; 3 to 5 percent of all children (NIMH). ... see also overview of ADHD.

Prevalance Rate:

approx 1 in 82 or 1.21% or 3.3 million people in USA [Source statistic for calcuation: "3.3 million children have ADD in the USA (NHIS-97); estimated 2 million American children; 3 to 5 percent of all children (NIMH)." -- see also general information about data sources]

About prevalence and incidence statistics:

The term 'prevalence' of ADHD usually refers to the estimated population of people who are managing ADHD at any given time. The term 'incidence' of ADHD refers to the annual diagnosis rate, or the number of new cases of ADHD diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

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