Impairment criteria embedded in DSM-IV required endorsement of some/a lot/extreme level of impairment or moderate/severe/very severe level of symptom severity. In order to more clearly identify disorders that were clinically significant, our definition of severe lifetime disorders used higher thresholds of impairment that required endorsement of “a lot” or “extreme” impairment in daily activities, or “severe or very severe” distress. Severe emotional disorders required both distress and impairment to be present, and severe behavior disorders (ADHD, ODD, and CD) required endorsement of symptom criteria by both the parent and the adolescent.
