6.78 CHILDREN WITH OPPOSITIONAL DEFIANT DISORDER IN THE DANISH NATIONAL BIRTH COHORT

Objectives: The diagnosis of childhood ODD reflects both behavioral and affective symptomatology that may be divided into three dimensions: irritable, headstrong, and hurtful. It is well known that children with ODD have a marked risk for concurrent and later psychopathology. However, it seems that the type of psychopathology (internalizing vs. externalizing) is dependent on the ODD symptom distribution between dimensions. The aims of the study were: 1) To estimate the prevalence of ODD in a Danish National Birth Cohort (DNBC); 2) To examine how the ODD symptom presentation divided into the three dimensions is associated with comorbid psychopathology; and 3) To examine to what extent children with ODD are exposed to life stressors. Methods: The study had a two-phase nested case-control design in the DNBC. Mothers of 3,421 DNBC children (age 8-10 years) completed the online Development and Well-Being Assessment (DAWBA). Results: The DNBC ODD total point prevalence was 1.0 percent. The irritable dimension was associated with co-occurring emotional disorders (OR 3.4; p