Abstract
BACKGROUND: Depression is a common mental disorder. Detecting (sub)clinical depressive symptoms in adolescents at an early stage and offering a low-threshold early intervention can minimize the risk of serious and/or long-term depression. As such, a digital intervention can be a low-threshold preventive and early intervention. This study aims to examine whether the Boost My Mood (BMM)-app is a suitable preventive early intervention for adolescents with (sub)clinical depressive symptoms. METHODS: This naturalistic single-arm evaluation study (N = 50) was conducted in adolescents aged 16-21 with (sub)clinical depressive symptoms. Furthermore, the BMM-app was studied in relation to anxiety, worrying, stress, and sleeping problems. An exploratory objective was to determine whether positive expectations and social support are related to app use. RESULTS: The study showed a significant decrease in not only depressive symptoms, but also anxiety, worrying and stress while using the BMM-app. Sleeping problems did not significantly decrease over time while using the BMM-app. The degree of use of the BMM-app and telling significant others about using the BMM-app were both not related to a decrease in depressive symptoms. The BMM-app was used significantly more when the adolescent had told relatives about their depressive symptoms. CONCLUSIONS: A digital intervention, such as the BMM-app, can be a low-threshold preventive and early intervention for adolescents with (sub)clinical depressive symptoms. Beneficial effects of the BMM-app were reported on depressive symptoms as well as other aspects of quality of life, such as anxiety, worrying, and stress. Whereas several factors may have played a role in the current findings on depressive symptoms, there are reasons to assume that part of the reduction in symptoms could be attributed to the BMM-app. Although no causality can be assumed, this study is a first step in the implementation of preventive apps in mental health care.