@Article{info:doi/10.2196/18047, author="Lindqvist, Karin and Mechler, Jakob and Carlbring, Per and Lilliengren, Peter and Falkenstr{\"o}m, Fredrik and Andersson, Gerhard and Johansson, Robert and Edbrooke-Childs, Julian and Dahl, Hanne-Sofie J and Lindert Bergsten, Katja and Midgley, Nick and Sandell, Rolf and Thor{\'e}n, Agneta and Topooco, Naira and Ulberg, Randi and Philips, Bj{\"o}rn", title="Affect-Focused Psychodynamic Internet-Based Therapy for Adolescent Depression: Randomized Controlled Trial", journal="J Med Internet Res", year="2020", month="Mar", day="30", volume="22", number="3", pages="e18047", keywords="depressive disorder; adolescents; psychodynamic; internet-based treatment; treatment outcome; mobile phone", abstract="Background: Adolescent depression is one of the largest health issues in the world and there is a pressing need for effective and accessible treatments. Objective: This trial examines whether affect-focused internet-based psychodynamic therapy (IPDT) with therapist support is more effective than an internet-based supportive control condition on reducing depression in adolescents. Methods: The trial included 76 adolescents (61/76, 80{\%} female; mean age 16.6 years), self-referred via an open access website and fulfilling criteria for major depressive disorder. Adolescents were randomized to 8 weeks of IPDT (38/76, 50{\%}) or supportive control (38/76, 50{\%}). The primary outcome was self-reported depressive symptoms, measured with the Quick Inventory of Depressive Symptomatology for Adolescents (QIDS-A17-SR). Secondary outcomes were anxiety severity, emotion regulation, self-compassion, and an additional depression measure. Assessments were made at baseline, postassessment, and at 6 months follow-up, in addition to weekly assessments of the primary outcome measure as well as emotion regulation during treatment. Results: IPDT was significantly more effective than the control condition in reducing depression (d=0.82, P=.01), the result of which was corroborated by the second depression measure (d=0.80, P<.001). IPDT was also significantly more effective in reducing anxiety (d=0.78, P<.001) and increasing emotion regulation (d=0.97, P<.001) and self-compassion (d=0.65, P=.003). Significantly more patients in the IPDT group compared to the control group met criteria for response (56{\%} vs 21{\%}, respectively) and remission (35{\%} vs 8{\%}, respectively). Results on depression and anxiety symptoms were stable at 6 months follow-up. On average, participants completed 5.8 (SD 2.4) of the 8 modules. Conclusions: IPDT may be an effective intervention to reduce adolescent depression. Further research is needed, including comparisons with other treatments. Trial Registration: International Standard Randomised Controlled Trial Number (ISRCTN) 16206254; http://www.isrctn.com/ISRCTN16206254 ", issn="1438-8871", doi="10.2196/18047", url="http://www.jmir.org/2020/3/e18047/", url="https://doi.org/10.2196/18047", url="http://www.ncbi.nlm.nih.gov/pubmed/32224489" }