Development and Evaluation of a Brief Compassion-Based Intervention for Managing Depression and Anxiety in Family Caregivers of Lung Cancer Patients: A Mixed Methods Randomized Controlled Trial

Objectives: This 3-year study aims to develop, refine, and evaluate a brief compassion-based intervention specifically designed for family caregivers of lung cancer patients. In the first year, the primary focus will be on developing the intervention content and assessing its feasibility and acceptability. In the second and third years, the goal will be to assess the intervention's effects on depression and anxiety.

Method: In the first year, the intervention will be developed in three stages. Initially, the intervention will be created based on compassion-focused theory and evidence-based exercises, incorporating feedback from family caregivers in previous studies and insights from professionals to ensure its relevance to lung cancer caregivers. Next, a pilot study will test the intervention's feasibility and acceptability with 30 family caregivers, using mixed methods to gather session-by-session feedback and assess recruitment, retention, and adherence. Following the pilot, the intervention will be revised based on participant and researcher feedback, preparing it for further study. In the second and third years, a randomized controlled trial (RCT) will be conducted with 84 participants randomly assigned to either the 4-session Brief Compassion-Based Intervention (BCI) or a single-session Telephone-Based Support and Education (TSE) control group. Outcomes, including depression, anxiety, caregiver stress, mindfulness, self-compassion, and self-efficacy, will be measured at baseline, immediately post-intervention, and at 3- and 6-month follow-ups. For data analysis, long-term follow-up quantitative data will be analyzed using the Generalized Estimating Equation (GEE) to examine group differences. Moderation and mediation analyses will be conducted to explore potential moderators and mechanisms of the intervention. Qualitative data from interviews will be analyzed using content analysis.

Expected Results: This study is expected to provide a comprehensive understanding of the feasibility, acceptability, and effectiveness of compassion-based interventions for lung cancer caregivers, contributing to their application in clinical care practice.