A literature review of the relationship between dyadic coping and dyadic outcomes in cancer couples

Couples are usually affected by cancer as patient-partner dyads, and they may react as a unit rather than as individuals, i.e., dyadic coping. This paper aims to comprehensively summarise the relationship between dyadic coping and dyadic outcomes (relationship satisfaction, quality of life, and psychological adjustment) in cancer couples, and provide valuable evidence to guide future research.A systematic search of five online databases, e.g., Cochrane Library, Embase, Medline, PubMed, and PsycINFO, was conducted to identify cancer couple-based studies published in English or Chinese from January 1990 to March 2021. A manual search was also performed on the article reference lists.Twenty-eight studies met the inclusion criteria. We found that communication, supportive dyadic coping, delegated dyadic coping and common dyadic coping might strengthen marital bonds, alleviate couples' stress, and facilitate mental health, but on the other hand, they possibly increase patients' and/or partners' physical or psychological burden. Negative dyadic coping and protective buffering were related to lower relationship satisfaction, worse quality of life, and more depressive symptoms. Patients reported more self-emotional disclosure, common dyadic coping, and negative dyadic coping than partners, while partners showed more holding back, supportive dyadic coping, delegated dyadic coping, and protective buffering. Moreover, patients were more susceptible to dyadic coping strategies.This review provides a comprehensive overview of the relationship between dyadic coping and dyadic outcomes. Based on the available evidence, the development of personalised interventions for improving dyadic coping is required to help couples live better with cancer.