Dyadic effects of social support on psychological distress in patients with advanced lung cancer and spousal caregivers: The mediating role of sense of coherence.

Objective: The primary objective of this study was to examine the dyadic relationships between perceived social support, sense of coherence (SOC), and psychological distress in advanced lung cancer patients and their spousal caregivers with the dyadic analysis method.

Methods: 302 dyads of patients and their spouses were recruited between April 2023 to October 2023 from a Chinese tertiary hospital. Participants' perceived social support, SOC, and psychological distress were evaluated by corresponding questionnaires. In order to explore the potential dyadic associations between the covariates, the data were analyzed by adopting the actor-partner interdependence mediation model (APIMeM).

Results: The findings demonstrated that the impact of perceived social support on psychological distress had both actor and partner effects. Specifically, the perceived social support of patients and their spouses was directly and positively associated with their own psychological distress. Furthermore, in patient-spouse dyads, SOC mediated the actor effects of perceived social support on psychological distress. Another important finding was that perceived social support by spouse had a direct or indirect negative partner effect on the psychological distress of patients.

Conclusion: The investigation uncovered a dyadic interdependence between perceived social support, psychological distress, and SOC. It is necessary for medical professionals to identify patients and spouses who report poor levels of SOC and perceived social support and implement targeted interventions to address these concerns.