Effectiveness and Implementation of a School-based Mental Well-being Intervention Among Adolescents of Bharatpur, Nepal

Adaptation, Effectiveness and Implementation of a School-Based Mental Well-Being Intervention (CROSS-MIND) Among Adolescents of Bharatpur Metropolitan, Chitwan, Nepal

The goal of this study is to evaluate the effectiveness and assess the implementation of CROSS-MIND, a school-based mental well-being intervention for adolescents in Nepal. The study uses a Hybrid Type 1 mixed-methods design. The main questions it aims to answer are:

Does CROSS-MIND improve students' mental well-being, self-esteem, and behavioural and emotional outcomes compared with usual school activities? Is CROSS-MIND acceptable, feasible, appropriate, and delivered with adequate fidelity, and what barriers and facilitators influence its delivery by teachers?

For the effectiveness evaluation, classes of grades 6 to 10 in five schools in Bharatpur Metropolitan City will be randomly assigned to receive either the CROSS-MIND intervention or usual school activities. Students will complete questionnaires before and after the intervention. Students in intervention classes will participate in eight weekly storytelling and reflection sessions of approximately 90 minutes, delivered by trained teachers. Qualitative interviews and focus group discussions will also be conducted with selected students, teachers, school principals, and psychologists to explore experiences of the intervention and factors influencing its implementation.

Adolescent mental well-being is an important public health concern, and schools provide an appropriate setting for universal mental health promotion interventions. This study aims to evaluate CROSS-MIND, a school-based mental well-being intervention designed for adolescents in Nepal.

The effectiveness component is a pilot cluster randomized controlled trial in which classes from five schools in Bharatpur Metropolitan City will be randomly assigned to either the CROSS-MIND intervention or usual school activities. Students in Grades 6-10 will participate in baseline and endline assessments. The primary outcome is mental well-being measured using the Warwick-Edinburgh Mental Well-being Scale (WEMWBS). Secondary outcomes include self-esteem, behavioural and emotional problems, depressive symptoms, and anxiety symptoms, measured using the Rosenberg Self-Esteem Scale (RSES), Strengths and Difficulties Questionnaire (SDQ), PHQ-9-A, and GAD-7-A, respectively.

CROSS-MIND consists of eight weekly storytelling circle sessions of approximately 90 minutes, delivered by trained teachers within the school setting. The intervention uses structured storytelling, reflection, creative expression, and group discussion to support positive self-identity, emotional awareness, social connectedness, coping skills, and psychological well-being.

The study also includes an implementation component. Implementation will be assessed in terms of acceptability, feasibility, appropriateness, and fidelity. Qualitative interviews and focus group discussions will explore participants' experiences and identify barriers and facilitators to implementation.

Inclusion criteria:

• Students enrolled in grades 6-10 in the participating schools
• Students whose parent or guardian provides written informed consent
• Students who provides written informed assent

Exclusion Criteria:

- Students who are not expected to participate in regular classroom activities