Before revision: Diagnosis Though the American Psychiatric Association's criteria for Attention Deficit Hyperactivity Disorder (ADHD), and the World Health Organization's criteria for hyperkinetic disorder each list a very similar set of 18 symptoms, the differing rules governing diagnosis meant that hyperkinetic disorder featured greater impairment and more impulse-control difficulties than typical ADHD, and it most resembled a severe case of , and it mostly resembled a severe case of ADHD combined type.
After revision: Diagnosis Though the American Psychiatric Association's criteria for Attention Deficit Hyperactivity Disorder (ADHD), and the World Health Organization's criteria for hyperkinetic disorder each list a very similar set of 18 symptoms, the differing rules governing diagnosis meant that hyperkinetic disorder featured greater impairment and more impulse-control difficulties than typical ADHD, and it most resembled a severe case of ADHD combined type.