The clustering of psychopathology among adults seeking treatment for alcohol and drug addiction

Journal of Substance Abuse Treatment
Karen UrbanoskiBrian Rush


Beyond the high prevalence of co-occurring mental and substance use disorders, little is known about more complex patterns of psychopathology and multimorbidity, particularly in treatment populations. We sought to identify a parsimonious set of latent classes to describe the structure of mental disorder comorbidity among adults entering outpatient addiction treatment, and explore differences in the structure and prevalence of classes across sociodemographic characteristics. Participants (N=544) completed the Psychiatric Diagnostic Screening Questionnaire at treatment admission. We used latent class analysis to identify classes of clients with specific patterns of co-occurring mental disorders. The best-fitting solution identified 3 classes, characterized by no comorbidity (i.e., substance use disorders only), co-occurring major depression, and multimorbidity or a high degree of psychopathology. Older age was associated with lower probability of being in the class with co-occurring major depression, women were more likely than men to be in the multimorbid class, and being married or partnered was associated with a lower probability of being in either of the comorbid classes. These results are consistent with general population r...Continue Reading


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