title: A new look at inter-informant agreement on conduct disorder using a latent class approach.
abstract: This study examined agreement on aggressive and nonaggressive conduct disorder in a general population sample of 14- to 17-year-old adolescents (n=1165) and their mothers. We collected diagnostic interview data and applied latent class analyses to estimate inter-informant agreement. The preferred model for aggressive conduct disorder for both males and females was a one-latent-variable/two-class model specifying no inter-informant disagreement beyond chance expectations. This model estimated the prevalence of aggressive conduct disorder to be 13% for males and 0.4% for females. For nonaggressive conduct disorder, a one-latent-variable/three-class model specifying asymmetric agreement was preferred for both males and females. This model estimated the prevalence of nonaggressive conduct disorder in adolescents to be 18% according to males and 13% according to mothers. Prevalence estimates were 12% according to females and 7% according to mothers. Symptom sensitivity estimates for all models were poor whereas specificity estimates were near perfect to perfect. Males had higher rates of aggressive and nonaggressive conduct disorder across informants. There was a high level of adolescent-mother agreement on both types of conduct disorder. However, there were some differences, suggesting that aggressive and nonaggressive are two valid subtypes of conduct disorder with different prevalence estimates and agreement levels.
authors.affiliation: Research Unit on Children's Psychosocial Maladjustment, University of Montreal, C.P. 6128, succursale Centre-ville, Montreal, Quebec, Canada H3C 3J7. eromano@justine.umontreal.ca
authors.forename: Elisa
authors.initials: E
authors.lastname: Romano
authors.forename: Raymond H
authors.initials: RH
authors.lastname: Baillargeon
authors.forename: Hong-Xing
authors.initials: HX
authors.lastname: Wu
authors.forename: Mark
authors.initials: M
authors.lastname: Zoccolillo
authors.forename: Frank
authors.initials: F
authors.lastname: Vitaro
authors.forename: Richard E
authors.initials: RE
authors.lastname: Tremblay
mesh_terms: D000293:Adolescent; D000328:Adult; D000374:Aggression / Q000523:psychology; D016241:Child of Impaired Parents / Q000523:psychology / Q000706:statistics & numerical data; D019955:Conduct Disorder / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D008297:Male; D009035:Mothers / Q000523:psychology / Q000706:statistics & numerical data; D015588:Observer Variation; D015995:Prevalence; D011594:Psychometrics; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires