The mental health first aid (MHFA) training is an evidence-based programme that is known to improve undergraduate students’ attitudes towards mental illness and confidence in helping people with mental health problems. MHFA training will be implemented at a university in Hong Kong to address growing concerns about mental health challenges among students. Given the context of a university-wide systematic MHFA training implementation, this evaluation uses an intervention logic framework to evaluate the processes and longitudinal outcomes.

A mixed-method approach will be used where the quantitative component will gather data from a review of records and a case-control study for outcome evaluation; the qualitative component will gather data from individual interviews. All first-year students from the university in the academic year 2024–2025 (ie, September 2024 to August 2025) will be enrolled in the mandatory MHFA training. The outcome evaluation will assess effectiveness through short-, intermediate- and long-term outcomes. An online questionnaire will be distributed to the students before (pre) and immediately after (post) the MHFA training. For comparison, second-year students who had not participated in MHFA training will be invited to complete the same online questionnaire. The questionnaires will be administered further to those who completed the MHFA training at 12 months (ie, academic year 2025–2026) and 24 months (ie, academic year 2026–2027) post-training to evaluate intermediate-term and long-term effects, respectively. The process evaluation explores feasibility, fidelity, adoption and the barriers and enablers to implementation.

This evaluation has been approved by the Human Research Ethics Committee of Hong Kong Metropolitan University (reference number HE-SF2024/35). The findings are expected to contribute to establishing long-term effects on mental health literacy and on the actual mental health support actions provided by participants, which goes beyond the intention to help. This evaluation would also facilitate a better understanding of the processes that need to be considered in a systematic MHFA training implementation in a university context. The findings will be disseminated in academic and public health community settings.

This project has been registered in the Open Science Framework. Fully anonymised data will be saved and subsequently made available through the following OSF registration: https://doi.org/10.17605/OSF.IO/92N5Q.