The Opp study was carried out in 2023.

Both pupils at secondary and upper secondary schools as well as students at universities in Norway have taken part in the Opp study.

All the participants in the study have contributed to us being able to evaluate the effect Opp has on various health targets.

We thank everyone who participated in the study!

Project period: 01.08.2021 - 15.12.2030.

Ethical approval: Approved by the regional Research Ethics Committee (279207) and by the Norwegian Center for Research Data (715456). 

Trial registration: ClinicalTrials.gov NCT05211713

Protocol article: Kaiser, S., Rye, M., Jakobsen, R., Martinussen, M., Høgsdal, H., & Kyrrestad, H. (2023). A Universal Mental Health–Promoting Mobile App for Adolescents: Protocol for a Cluster Randomized Controlled Trial. JMIR Research Protocols12(1). https://doi.org/10.2196/42119 

User evaluation: Høgsdal, H., Kaiser, S., & Kyrrestad, H. (2023). Adolescents’ assessment of two mental health–promoting mobile apps: results of two user surveys. JMIR Formative Research. Doi: 10.2196/40773