Category: Comorbidity - Substance Use and Other
The association between and comorbidity of alcohol use and depression among adolescents has been established in numerous studies. Less is known about the reciprocal effects of alcohol use and depression over time. Examining these variables in the context of an intervention provides information about how changes in one effects the other. The current study examines the effect of a brief substance use intervention on co-occurring substance use and depressive symptoms in adolescents. Hypothesis include (1) The quantity and frequency of substance use will decrease from pre-treatment to post-treatment follow up. (2) The number of substance-related consequences will decrease from pre-treatment to post-treatment follow up. (3) Depression symptoms will decrease from pre-treatment to post-treatment follow up. (4) Adolescents with more severe depression symptoms at pre-treatment will demonstrate a greater reduction in depression symptoms compared to adolescents with less severe depression symptoms at pre-treatment. (5) Reduction in substance use from pre-treatment to post-treatment check-in will predict reduction in depression symptoms at post-treatment follow up. Participants (N = 327) were adolescents (ages 13-19, mean = 16) from the greater Seattle area recruited for a school-based substance use intervention, Project READY. Participants were diverse in ethnicity with Caucasian (32%), Asian American (22%), Hispanic (18%), African American (11%), Multiethnic (10%), and Native American/Alaskan Native (1%) adolescents represented in the sample. The sample included largely male participants (70%). Analysis will be conducted using the memore macro provided by Montoya and Hayes (2016) which estimates the total, direct, and indirect effects of a predictor on an outcome variable through one or more mediators in the two-occasion repeated measures design. The results will aid clinicians and researchers in understanding secondary effects of substance use interventions on comorbid depression.