%0 Journal Article %@ 2291-5222 %I JMIR Publications %V 9 %N 7 %P e26498 %T A Mobile-Based Intervention to Increase Self-esteem in Students With Depressive Symptoms: Randomized Controlled Trial %A Bruhns,Alina %A Lüdtke,Thies %A Moritz,Steffen %A Bücker,Lara %+ University Medical Center Hamburg-Eppendorf (UKE), Martinistraße 52, Hamburg, 20251, Germany, 49 40741055868, l.buecker@uke.de %K mHealth %K depression %K depressive symptoms %K students’ mental health %K self-help smartphone app %K mobile phone %K self-esteem %D 2021 %7 12.7.2021 %9 Original Paper %J JMIR Mhealth Uhealth %G English %X Background: Depressive symptoms are one of the most common and ever-increasing mental health problems among students worldwide. Conventional treatment options, particularly psychotherapy, do not reach all students in need of help. Internet- and mobile-based interventions are promising alternatives for narrowing the treatment gap. Objective: In the framework of a randomized controlled trial, we aim to investigate the effectiveness, acceptance, and side effects of a self-help smartphone app (MCT & More) based on cognitive behavioral therapy, mindfulness, acceptance and commitment therapy, and metacognitive training in a sample of students with self-reported depressive symptoms. Furthermore, we were interested in examining the influence of treatment expectations and attitudes toward internet- and mobile-based interventions on treatment adherence and effectiveness. Methods: A total of 400 students were recruited via open access websites and randomized to either the intervention group (n=200), who received access to the self-help smartphone app MCT & More for a period of 4 weeks, or to a wait-list control group (n=200). The Patient Health Questionnaire-9 (depression) served as the primary outcome parameter, and the Rosenberg Self-esteem Scale (self-esteem) and the global item of the World Health Organization Quality of Life-abbreviated version (quality of life) served as the secondary outcome parameters. The Attitudes Towards Psychological Online Interventions was used to measure attitudes toward internet- and mobile-based interventions. Outcome expectations were assessed using the Patient Questionnaire on Therapy Expectation and Evaluation, and side effects were assessed using the Inventory for Assessing Negative Effects of Psychotherapy. Results: Per-protocol (PP), complete-case, and intention-to-treat analyses showed a significantly higher reduction in depressive symptoms (PP: F1,222=3.98; P=.047; d=0.26) and a significantly higher increase in self-esteem (PP: F1,220=8.79; P=.003; d=0.40) in the intervention group than in the wait-list control group. Most participants regularly used the self-help smartphone app (91/120, 75.8%, at least once a week). The more positive the attitude toward internet- and mobile-based interventions (r=0.260; P=.004) and the more positive the outcome expectation (r=0.236; P=.009), the more frequently the self-help smartphone app was used. Conclusions: The effectiveness of the self-help smartphone app MCT & More was demonstrated among students with depressive symptoms compared with a wait-list control group. The app could be offered regularly as a low-threshold intervention to enhance students’ health. Trial Registration: German Clinical Trials Register DRKS00020941; https://tinyurl.com/pr84w6er %M 34255711 %R 10.2196/26498 %U https://mhealth.jmir.org/2021/7/e26498 %U https://doi.org/10.2196/26498 %U http://www.ncbi.nlm.nih.gov/pubmed/34255711