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Related Experiment Videos

ADHD comorbidity findings from the MTA study: comparing comorbid subgroups.

P S Jensen1, S P Hinshaw, H C Kraemer

  • 1Center for the Advancement of Children's Mental Health, Columbia University/NYSPI, 1051 Riverside Drive, Unit 78, New York, NY 10032, USA. pj131@columbia.edu

Journal of the American Academy of Child and Adolescent Psychiatry
|February 24, 2001
PubMed
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Attention-deficit/hyperactivity disorder (ADHD) with internalizing disorders or disruptive disorders may represent distinct subtypes. Treatment response varies significantly based on the specific comorbid conditions present in children with ADHD.

Area of Science:

  • Child and Adolescent Psychiatry
  • Neurodevelopmental Disorders
  • Clinical Psychology

Background:

  • Attention-deficit/hyperactivity disorder (ADHD) is frequently diagnosed alongside other conditions.
  • The clinical significance of comorbid disruptive disorders (ODD/CD) or internalizing disorders (anxiety/depression) in ADHD remains debated.
  • Clarifying these ADHD presentations could improve diagnostic accuracy and treatment efficacy.

Purpose of the Study:

  • To investigate whether ADHD with comorbid internalizing disorders or disruptive disorders constitutes distinct clinical entities.
  • To determine the clinical significance of potential ADHD + internalizing disorder or ADHD + ODD/CD syndromes.
  • To inform better diagnostic decision-making, treatment planning, and outcomes for children with ADHD.

Main Methods:

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  • Utilized cross-sectional and longitudinal data from 579 children (aged 7-9.9 years) with ADHD.
  • Data sourced from the NIMH Collaborative Multisite Multimodal Treatment Study of Children With Attention-Deficit/Hyperactivity Disorder (MTA).
  • Applied validational criteria to compare ADHD subjects with and without comorbid internalizing disorders and ODD/CD.

Main Results:

  • Found substantial main effects for internalizing and externalizing comorbid disorders in ADHD.
  • Identified interactions between parent-reported anxiety and ODD/CD status on treatment response.
  • Children with ADHD and anxiety (no ODD/CD) responded well to behavioral and medication treatments.
  • ADHD-only or ADHD with ODD/CD (no anxiety) responded best to medication.
  • Children with both anxiety and ODD/CD responded optimally to combined treatments.

Conclusions:

  • Identified three distinct clinical profiles: ADHD + anxiety (no ODD/CD), ADHD + ODD/CD (no anxiety), and ADHD + anxiety + ODD/CD.
  • These profiles may warrant classification as distinct ADHD subtypes.
  • Further research into these ADHD classification options is recommended for clinical, etiological, and genetic studies.