The Dyadic Effects of Self-Efficacy on Quality of Life in Advanced Cancer Patient and Family Caregiver Dyads: The Mediating Role of Benefit Finding, Anxiety, and Depression

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Abstract
Objectives. To explore the dyadic interdependence of self-efficacy, benefit finding, anxiety, depression, and QOL in cancer patient (CP) and family caregiver (FC) dyads, and to ascertain the dyadic effects of self-efficacy on quality of life (QOL) in CP-FC dyads. Methods. Conducted from November 2014 to December 2015, participants comprised 772 CP-FC dyads. The study surveyed participant characteristics, self-efficacy, benefit finding, anxiety, depression, and QOL. Data were analyzed using Pearsons correlation, T-test, and actor-partner interdependence mediation model (APIMeM). Results. CPs self-efficacy was positively correlated with both their own and FCs benefit finding and mental component summary (MCS), and negatively associated with anxiety and depression (all Psr=0.1440.432). However, CPs self-efficacy was only positively correlated with their own physical component summary (PCS) (r=0.193), but not FCs PCS. The same profile was identified in FCs self-efficacy (all Psr=0.1000.468). FCs reported higher levels of self-efficacy and PCS compared to CPs (both Psr=0.1680.437) were identified among all paired variables in CP-FC dyads (all PsConclusions. Study findings not only support the dyadic interdependence of self-efficacy, benefit finding, anxiety, depression, and QOL in CP-FC dyads but confirm the hypothesis that dyads self-efficacy may impact their MCS/PCS via an indirect approach to improve benefit finding and relieve anxiety and/or depression in CP-FC dyads.
Funding Information
  • National Natural Science Foundation of China (82172844, 81773297)

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