What percentage of people fall under each ADHDsubtype? Are there more people with one subtype than another?

A study published in the Journal of the American Academy of Child and Adolescent Psychiatry takes a careful look at the similarities and differences between children with these different subtypes of ADHD (February, 1998). This is a very interesting article and here are some of the highlights:



The combined type group is the most common, occurring in 61% of identified cases compared to 30% for the inattentive type and 9% for the hyperactive impulsive type.