At the completed intake (age-11) and first follow-up (age-14) assessments, maternal reports of each twin's symptoms of ADHD, CD, ODD, major depressive disorder (MDD), substance use disorders, and anxiety disorders (separation anxiety at intake; generalized and social anxiety disorders at follow-up) were obtained with a modified version of the Diagnostic Interview for Children and Adolescents – Revised (DICA-R; (Reich, 2000; Welner et al., 1987)), updated based on DSM-IV criteria. Child reports of the same disorders were obtained using a parallel child version of the DICA-R. Eating pathology, which may be elevated in girls with ADHD (Mikami et al., 2008), was assessed via structured interview diagnoses of anorexia and bulimia and with the 30-item Minnesota Eating Behavior Survey (von Ranson et al., 2005).
