Digital Mental Health Interventions for Adolescents: An Integrative Review Based on the Behavior Change Approach.

Adolescents are at a critical developmental stage marked by rapid cognitive, emotional, and social changes, making them highly susceptible to mental health issues. Recently, digital health interventions (DHIs) have emerged as innovative and scalable tools for promoting mental well-being in this population. This integrative review was conducted based on comprehensive literature searches of major academic databases, including PubMed, Scopus, Web of Science, and PsycINFO. Studies published between January 2010 and December 2024 were identified using keywords such as "adolescent mental health," "digital health intervention," "behavior change model," "e-health," "mobile mental health," and "digital therapeutics." The inclusion criteria comprised peer-reviewed studies on digital mental health interventions for adolescents that applied, fully or partially, a behavior change approach. Studies targeting adults, interventions without digital technology, the gray literature, and duplicate publications were excluded. We examined intervention strategies based on developmental stage prevention, early intervention, and recovery and highlighted key digital components such as accessibility, anonymity, personalization, and continuous monitoring. Furthermore, we analyzed case studies from various countries, including Korea, the United Kingdom, Australia, and Japan, to identify best practices and contextual challenges. DHIs rooted in sound psychological theory and ethical design can complement school- and community-based interventions by offering effective personalized support. The practical implications and future directions are discussed.