Cultural adaptation of a self-help app for grieving Syrian refugees in Switzerland. A feasibility and acceptability pilot-RCT.

The global refugee population has significantly increased, with Syrian refugees being one of the largest displaced groups. Bereavement represents a major challenge. However, access to mental health care is limited by structural and cultural barriers. Internet-based interventions (IBIs) offer a promising solution, but most are developed in Western contexts, limiting their cultural relevance. This study aimed to evaluate the acceptability, feasibility, and preliminary efficacy of a culturally adapted self-help IBI for bereaved Syrian refugees in Switzerland. In a mixed-methods pilot randomized controlled trial (RCT), 30 bereaved Syrian refugees were randomly assigned to a 5-week app-based intervention or a waitlist control group. Semi-structured interviews with the intervention group provided qualitative insights on feasibility and acceptability and were analyzed with framework analysis. Quantitative data assessed treatment satisfaction, adherence, and preliminary efficacy on grief, depression, posttraumatic stress disorder (PTSD), anxiety, well-being, disability, post-migration difficulties, and social support. Descriptive statistics were used for feasibility and acceptability, while linear mixed-effects models assessed efficacy. High treatment satisfaction, a low dropout rate and adherence of 40 % were found. Qualitative interviews indicated the intervention was relevant and beneficial, further adaptations were suggested. No significant group differences were found on bereavement or secondary outcomes. However, trends indicated reduced grief, anxiety, PTSD, and depression, with improved well-being and social support in the intervention group. The results suggest that this culturally adapted IBI is both feasible and acceptable for Syrian refugees. While trends are promising, a larger RCT is needed to investigate efficacy. This intervention shows potential as meaningful support for bereaved Syrian refugees.