title: Associated psychopathology in children with both ADHD and chronic tic disorder.
abstract: OBJECTIVE
  To examine the relation between severity of tic disorder and comorbid psychopathology in 47 prepubertal children with tic disorder who were referred for clinical evaluation of and treatment for attention-deficit hyperactivity disorder (ADHD), oppositional behaviors, and aggressive behaviors.
  
  
  METHODS
  Parents and teachers completed the Child Behavior Checklist (CBCL) and Teacher's Report Form (TRF) for each child.
  
  
  RESULTS
  Seventy-five percent of the sample was in the clinical range in at least two categories of psychopathology. When the children were divided into two groups on the basis of tic severity, significantly higher scores were obtained for children with more severe tics on the narrow-band Depressed, Uncommunicative, Obsessive-Compulsive, and Aggressive scales, and the broad-band internalizing scale of the CBCL. The severity groups did not differ on TRF scores. Children who were more aggressive also received higher CBCL scores.
  
  
  CONCLUSIONS
  The findings from this study suggest that the severity of chronic tics is a clinical indicator of complex psychopathology in children with ADHD who are referred for psychiatric evaluation.
authors.affiliation: Department of Psychiatry and Behavioral Science, State University of New York, Stony Brook 11794-8790, USA.
authors.forename: E E
authors.initials: EE
authors.lastname: Nolan
authors.forename: J
authors.initials: J
authors.lastname: Sverd
authors.forename: K D
authors.initials: KD
authors.lastname: Gadow
authors.forename: J
authors.initials: J
authors.lastname: Sprafkin
authors.forename: S N
authors.initials: SN
authors.lastname: Ezor
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis / Q000453:epidemiology*; D002648:Child; D002908:Chronic Disease; D015897:Comorbidity; D005260:Female; D006801:Humans; D008297:Male; D011569:Psychiatric Status Rating Scales; D012720:Severity of Illness Index; D013981:Tic Disorders / Q000175:diagnosis / Q000453:epidemiology*