We also used a single binary variable, labeled depression, to index the presence of any depressive disorder (major depressive disorder, dysthymia or minor depression). Similarly, we formed a variable to indicate any anxiety disorder including generalized anxiety disorder, separation anxiety disorder, specific phobia, social phobia and panic disorder. A further binary variable indexed the presence of DSM-IV attention deficit Hyperactivity Disorder (ADHD). Substance disorder was coded as positive if any psychosocial impairment secondary to substance use was reported.
