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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: J Atten Disord. 2010 Apr 8;15(2):122–129. doi: 10.1177/1087054709359907

Table 3.

Classification of 121 Adult Participants with Childhood ADHD by Symptom Criterion, Impairment Criterion, and Type

Type of ADHD Symptom Criterion

N (%)		 Symptom plus
Impairment Criteria
N (%)
Predominantly Inattentive 10 (8) 10 (8)
Predominantly Hyperactive-Impulsive 12 (10) 12 (10)
Combined 9 (7) 9 (7)
  Any of the above 31 (26) 31 (26)

Note. Inattentive and Hyperactive-Impulsive Types required that 6 of 9 behaviors were reported as “Often” or “Very Often”. The Combined Type required that both of these criteria were met. The Impairment Criterion additionally required that ADHD behaviors resulted in clinically significant impairment during the follow-up interval (ages 25 to 41).