Limitations on participation and global quality of life among CRC survivors with permanent stomas: moderated mediation analysis of psychological distress and family functioning.

Abstract

Although a cancer diagnosis and stoma creation leave colorectal cancer (CRC) survivors with significant limitations on participation in life activities that would impair their global quality of life (QoL), the underlying psychological mechanisms are understudied. The aim of this cross-section study was to examine whether psychological distress mediates the association of limitations on participation in life activity with global QoL, and whether family functioning moderated the indirect effects of limitations on participation in life activities on global QoL through psychological distress. CRC survivors with permanent stomas (n = 282) completed questionnaires assessing socio-demographic and clinical characteristics, limitations on participation in life activities, psychological distress, family functioning, and global QoL. The mediation model and moderated mediation model were conducted using the PROCESS macro for SPSS. Mediation analysis showed that the association of limitations on participation in life activities with global QoL was partially mediated by psychological distress (indirect effect = -0.087, 95% CI = -0.135 to -0.041). Moderated mediation analysis indicated that the indirect effects of limitations on participation in life activities on global QoL through psychological distress were significantly moderated by family functioning. Specifically, the indirect effects decreased were significant as family functioning levels increased. CRC survivors with permanent stomas experienced poor global QoL. The moderated mediation model provides a better understanding of how limitations on participation in life activities, psychological distress, and family functioning work together to affect global QoL. Interventions aiming to improve QoL among CRC survivors with permanent stomas should consider targeting these aspects.