Six- and Twelve-Month Follow-up Results of a Cluster Randomized Controlled Trial of a CBT-Based Group Course
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Six- and Twelve-Month Follow-up Results of a Cluster Randomized Controlled Trial of a CBT-Based Group Course Serap Keles 1,2
&
Thormod Idsoe 1
# Society for Prevention Research 2020
Abstract In the current study, we examined the durability of intervention gains over a 6- and 12-month follow-up period after the implementation of a CBT-based group intervention “Adolescent Coping with Depression Course” (ACDC) for adolescents with subclinical or mild-to-moderate depression. Data were collected from 228 youth, 133 of whom were allocated to the 14-week ACDC intervention and 95 to the usual care (UC) control condition. Analyses for the main outcome variable of depressive symptoms were performed using a random effects repeated measures piecewise growth model to estimate trajectory shape over time on an intention-to-treat basis. Results revealed that the reduction in depressive symptoms achieved during the intervention phase continued across the follow-up period for both ACDC and UC (i.e., depressive symptoms showed a significantly decreasing trend in both groups in intervention and follow-up phases); however, no differential effects between conditions were found during the follow-up phase. The direct and indirect effects of the intervention on the other outcome variables’ follow-up results were also presented. ISRCTN registry ISRCTN19700389. Registered 6 October 2015. https://doi.org/10.1186/ ISRCTN19700389. Full Protocol: https://doi.org/10.1186/s12888-016-0954-y Keywords Cluster RCT . Group CBT . Adolescents . Depression . Follow-up data
The “Adolescent Coping with Depression Course” (ACDC) is a CBT-based group intervention developed for the Norwegian context for adolescents with subclinical or mild-to-moderate depression (Børve 2010). A recent randomized controlled trial (RCT) showed a small to medium reduction in depressive symptoms for the ACDC group compared with the usual care (UC) control group (d = − .31) at post-intervention (Idsoe et al. 2019). Our aim with the present study was to examine the durability of these intervention gains over a 6- and 12month follow-up period after the post-intervention.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11121-020-01160-0) contains supplementary material, which is available to authorized users. * Serap Keles [email protected] Thormod Idsoe [email protected] 1
Norwegian Center for Child Behavioral Development, P.O. Box 7053, Majorstuen, 0306 Oslo, Norway
2
Knowledge Center for Education, University of Stavanger, Stavanger, Norway
Depression, as a common, recurring, and disabling/ impairing condition, is a serious problem for adolescents and associated with a range of problems, like school dropout, school difficulties, health problems, increased substance abuse, and problems with peers and family (Wells et al. 2009). Due to its prevalence and long-term impact, as well as low helpseeking behavior among adolescents, it is essential to identify and implement effective interventions (Derdikman-Eiron et al. 2013).
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