Exploring ADHD age-of-onset criterion in Brazilian adolescents

L. A. Rohde, J. Biederman, H. Zimmermann, M. Schmitz, S. Martins, S. Tramontina

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


Objective: To explore age-of-onset criterion for the diagnosis of attention-deficit hyperactivity disorder (ADHD) in a school sample of young Brazilian adolescents. Methods: 191 Students aged 12 to 14 years were evaluated using DSM-IV ADHD criteria, measures of ADHD symptoms and global impairment. Results: Both adolescents with ADHD (n = 30) and adolescents who fulfilled all DSM-IV ADHD criteria, except age of onset of impairment criterion (ADHD w/o age-of-onset, n = 27) had significantly higher scores on Attention Problems, Delinquent and Aggressive Behavior scales of the Child Behavior Checklist (CBCL) and lower scores on the Child Global Assessment scale (CGAS) than non-ADHD adolescents (n = 134). Adolescents with ADHD and youths with ADHD w/o age-of-onset did not differ significantly in any measure assessed. Conclusion: These results concur with recent literature proposing revision of the age-of-onset criterion for the diagnosis of ADHD.

Original languageEnglish
Pages (from-to)212-218
Number of pages7
JournalEuropean Child and Adolescent Psychiatry
Issue number3
StatePublished - 2000
Externally publishedYes


  • Attention deficit hyperactivity disorder
  • Hyperactivity
  • Hyperkinetic disorders, inattention


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