The Bud App: A protocol for a randomized controlled trial with an internal pilot phase targeting modifiable risk and...

International students face elevated risk for mental health problems and suicide, yet encounter multiple barriers to accessing timely and culturally responsive treatments. Key challenges include high rates of psychological distress, low mental health literacy, and reduced help-seeking, often compounded by perceived burdensomeness, a lack of belonging, and difficulties with emotion regulation. Bud is a self-guided, co-designed mobile app developed to address these challenges through an accessible digital intervention. This paper outlines a protocol for a randomized controlled trial evaluating the effectiveness, acceptability, engagement, and safety of Bud among international students enrolled at Australian tertiary institutions. The trial also includes an internal pilot phase to ensure the feasibility of the trial procedures, with benchmarks for recruitment, retention, and engagement. A community sample of 302 participants will be randomly assigned to either the intervention group (Bud app) or the active control group (online mental health fact sheets) for four weeks. Assessments will be completed online at baseline, two weeks, and four weeks post-baseline. The primary outcome is psychological distress, with secondary outcomes including help-seeking intentions, perceived burdensomeness and belonging, emotion regulation, mental health literacy, and suicidal ideation. Acceptability and engagement will be assessed using self-report and objective measures. Interviews will be conducted with a subset of 20 participants to explore their views on Bud further. This trial will provide the first evaluation of a suicide prevention tool specifically for international students. If effective, Bud could offer a scalable and culturally relevant solution to improve student mental health and reduce service access barriers.

ACTRN12625000584437.