title: Predicting girls' conduct disorder in adolescence from childhood trajectories of disruptive behaviors.
abstract: OBJECTIVE
  To examine girls' developmental trajectories of disruptive behaviors during the elementary school years and to predict conduct disorder symptoms and diagnosis in adolescence with trajectories of these behaviors.
  
  
  METHODS
  The sample was 820 girls from the province of Quebec followed over 10 years (1986-1996). A semiparametric mixture model was used to describe girls' developmental trajectories of teacher-rated disruptive behaviors between the ages of 6 and 12 years. The trajectories were used to predict conduct disorder symptoms and diagnosis when the girls were on average 15.7 years.
  
  
  RESULTS
  Four groups of girls following trajectories with distinct levels of disruptive behaviors were identified: a low, medium, medium-high, and high trajectory. Prediction with the trajectories indicated that girls on the medium, medium-high, and high trajectories reported a significantly higher number of conduct disorder symptoms in adolescence. However, only the girls on the medium-high and high trajectories were at significantly higher risk to meet DSM-III-R criteria for conduct disorder, compared with girls in the low group (odds ratio: 4.46). More than two thirds of the girls with conduct disorder were in the medium or higher-level trajectories.
  
  
  CONCLUSIONS
  The results suggest that there is an early-onset type of conduct disorder in girls.
authors.affiliation: Research Unit on Childrens Psychosocial Maladjustment, University of Montreal. scote@andrew.cmu.edu
authors.forename: S
authors.initials: S
authors.lastname: Côté
authors.forename: M
authors.initials: M
authors.lastname: Zoccolillo
authors.forename: R E
authors.initials: RE
authors.lastname: Tremblay
authors.forename: D
authors.initials: D
authors.lastname: Nagin
authors.forename: F
authors.initials: F
authors.lastname: Vitaro
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D019958:Attention Deficit and Disruptive Behavior Disorders / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology*; D002675:Child, Preschool; D019955:Conduct Disorder / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D006801:Humans; D015994:Incidence; D008297:Male; D011569:Psychiatric Status Rating Scales; D012720:Severity of Illness Index