Efficacy of Meaning-Centered Psychotherapy in adult patients with advanced cancer: A systematic review and meta-analysis

Objective: We conducted a PRISMA-compliant systematic review of clinical trials, and a meta-analysis of randomised clinical trials (RCTs) of manualised Meaning-Centered Psychotherapy (MCP) interventions for adult advanced cancer patients. We searched seven databases for trials published in English and Spanish, until March 27, 2021. Results: Seven trials were included in the systematic review, and four in the meta-analysis. The systematic review favoured the effectiveness of MCP for the improvement of spiritual well-being, quality of life (QoL), sense of meaning and psychological distress, although inconsistencies between the trials were found. In pre-post meta-analytic estimates, MCP had a superior therapeutic effect than control conditions for spiritual well-being (d=0.52, p<0.001), QoL (d=0.60, p<0.001), anxiety symptoms (d=-0.47, p<0.001), depressive symptoms (d=-0.50, p<0.001) and desire for hastened death (d=-0.28, p<0.001). No differences were observed in between-group comparisons. MCP was not associated with an increased risk of abandonment at post-treatment (OR=0.86, p=0.57). Conclusion: Manualised MCP interventions are a promising treatment for the improvement of spiritual well-being and quality of life and the reduction of psychological distress in adult patients with advanced cancer. The evidence base is still in an emerging state and should be expanded by higher methodological quality studies.