Indentifying co-occurring disorders in adolescent population.

A structured diagnostic interview (Practical Adolescent Diagnostic Interview) designed to gather basic information about substance use disorders, other mental health conditions, and related experiences was used in a variety of clinical settings. Anonymous data from 279 adolescents interviewed as part of routine clinical assessments in a variety of clinical programs were analyzed to assess the ability of the questions to identify potential problem areas and to provide a preliminary exploration of interrelationships between those problems. Results demonstrated that the vast majority of individuals manifested indications of multiple problems. For a given diagnostic condition, the trend is for those meeting at least the minimal DSM-IV criteria to exhibit substantially more than the minimum number of symptoms. Internal consistencies for item groups defining the various conditions range from more than .700 to over .900 indicating adequate to excellent internal consistency and reliability. Utility of the instrument for routine clinical use is also discussed.