title: Functional impairments in children with ADHD: unique effects of age and comorbid status.
abstract: OBJECTIVE
  Children with ADHD and comorbid disorders display poorer overall functioning compared with children with ADHD alone, though little research has examined the differential impact of externalizing versus internalizing comorbidities.
  
  
  METHODS
  This study examined the impact of internalizing and externalizing comorbidities on the academic and social functioning of 416 children with ADHD.
  
  
  RESULTS
  Children with ADHD and a comorbid externalizing disorder (with or without a concomitant internalizing comorbidity) displayed poorer social skills than those with ADHD alone. Children with ADHD and both an externalizing and internalizing comorbidity exhibited greater homework problems than their ADHD peers with fewer than two types of comorbidity. In addition, older children displayed significantly poorer social skills and greater homework problems than younger children. There was no interaction between comorbid status and age for any measure of academic or social functioning.
  
  
  CONCLUSIONS
  Results underscore the need for early interventions to address social skills and homework difficulties for children with ADHD and comorbid externalizing disorders.
authors.affiliation: Lehigh University, Bethlehem, PA 18015, USA. genery.booster@gmail.com
authors.forename: Genery D
authors.initials: GD
authors.lastname: Booster
authors.forename: George J
authors.initials: GJ
authors.lastname: Dupaul
authors.forename: Ricardo
authors.initials: R
authors.lastname: Eiraldi
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Power
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001007:Anxiety / Q000150:complications* / Q000175:diagnosis; D001289:Attention Deficit Disorder with Hyperactivity / Q000150:complications* / Q000175:diagnosis / Q000523:psychology; D002648:Child; D002653:Child Behavior Disorders / Q000150:complications* / Q000175:diagnosis; D002675:Child, Preschool; D003863:Depression / Q000150:complications* / Q000175:diagnosis; D004522:Educational Status; D005260:Female; D006801:Humans; D007859:Learning Disabilities / Q000150:complications* / Q000175:diagnosis; D008297:Male; D010379:Peer Group; D012917:Social Adjustment; D012919:Social Behavior; D012938:Social Perception