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Evaluation of the School-based SIM Program in Upper Secondary School Students
Sponsor: Region Örebro County
Summary
The Solution-Focused Intervention for Mental Health (SIM) is a universal, school-based programme designed to promote mental well-being among adolescents. Previous feasibility and development studies have supported the acceptability and feasibility of SIM in upper-secondary school settings. The present study is a two-arm, parallel-group cluster-randomised controlled superiority trial evaluating the effectiveness and cost-effectiveness of SIM among upper-secondary school students. The trial is conducted across six upper-secondary schools in Sweden. Classes are randomised in a 1:1 ratio, stratified by educational programme, to either the SIM intervention or a control condition. Students in the intervention arm receive the SIM programme in addition to usual school provision, while students in the control arm receive a lecture on mental well-being in addition to usual school provision. SIM is a structured, group-based programme applying solution-focused coaching principles and is delivered by trained school staff within ordinary school settings. The primary outcome is mental well-being, assessed using the Mental Health Continuum-Short Form. Secondary outcomes include mental health problems and perceived stress, and solution-building capability is examined as a potential mediator of intervention effects. Outcomes are assessed at baseline, immediately post-intervention, and at approximately six- and nine-month follow-up. The trial also includes process and implementation measures to assess intervention delivery and support interpretation of trial outcomes. By evaluating SIM under routine school conditions, the study aims to provide evidence on the effectiveness and cost-effectiveness of a scalable school-based approach to promoting adolescent mental well-being.
Official title: Evaluating the Efficacy and Cost-effectiveness of the School-based Solution-focused Intervention for Mental Health (SIM) in First Year of Upper Secondary School Students
Key Details
Gender
All
Age Range
15 Years - Any
Study Type
INTERVENTIONAL
Enrollment
727
Start Date
2026-01-14
Completion Date
2027-10
Last Updated
2026-09-01
Healthy Volunteers
Yes
Interventions
The Solution-focused Intervention for Mental health (SIM)
SIM is a manual-based program delivered to upper secondary school students in mentor groups by specially trained teachers. It consists of group-based, solution-focused coaching set within a normative frame of mental well-being. By co-creating perceptions and meaning through language and dialogue, focusing on resources for approaching a preferred future, students increase their solution-building capability, thereby acquiring skills to become agents in their own life, more aware of and prone to invest in mental health.
Locations (1)
University Health Care Research Center, Region Örebro
Örebro, Sweden