Article
Examining the comorbidity of ADHD-related behaviours and conduct problems using a twin study design
1 Sept 2001
Abstract excerpt
BACKGROUND: Although attention-deficit hyperactivity disorder (ADHD) and conduct disorder (CD) frequently co-occur, the underlying mechanisms for this comorbidity are not well understood. AIMS: To examine whether ADHD and conduct problems share common risk factors and whether ADHD+CD is a more heritable variant of ADHD. METHOD: Questionnaires were sent to 2846 families. Parent-rated data were obtained for 2082...
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