Table 1.

Selected Characteristics of Children With and Without ADHD*

CharacteristicChildren With ADHD (n = 2992) (%)Children Without ADHD (n = 11 968) (%)
Sex
 Male2311 (77.2)9244 (77.2)
 Female681 (22.8)2724 (22.8)
Age group
 3–6 y148 (5.0)594 (5.0)
 7–12 y1583 (52.9)6332 (52.9)
 13–17 y1261 (42.1)5042 (42.1)
Mental health conditions860 (28.7)452 (3.8)
 Internalizing conditions331 (11.1)183 (1.5)
 Externalizing conditions367 (12.3)79 (0.7)
 Substance abuse or dependence108 (3.6)116 (1.0)
Other comorbidities1044 (34.9)3696 (30.9)
 Asthma164 (5.5)637 (5.3)
 Diabetes5 (0.2)30 (0.3)
 Epilepsy42 (1.4)46 (0.4)
 Sickle cell anemia254 (8.5)835 (7.0)
Psychotropic medication fills2481 (82.9)173 (1.4)
  • * Participants were between ages 3 and 17 years, were continuously enrolled at GHC in 1997, and had at least 1 health care visit or hospitalization in 1997.

  • Children without ADHD were randomly selected and matched 4:1 to children with ADHD on age and sex.

  • Other comorbidities were determined by the PCDS classification.