Dyadic Associations Between Burden and Depressive Symptoms Among Patients With Heart Failure and Their Caregivers

BACKGROUND: Depressive symptoms are prevalent in patients with heart failure and their family caregivers. Given the interpersonal interactions between dyadic individuals with intimate relationship, it is essential to consider the dyads as a unit when exploring the factors associated with depressive symptoms in heart failure patient-caregiver dyads. OBJECTIVE: The aims of this study were to explore the dyadic effects of burden on depressive symptoms in heart failure patient-caregiver dyads and investigate whether perceived stress acts as a mediator in these relationships. METHODS: In this cross-sectional study, 237 heart failure patient-caregiver dyads were recruited from 3 hospitals in China between November 2018 and June 2019. Symptom burden, caregiving burden, perceived stress, and depressive symptoms were assessed using self-report questionnaires. The actor-partner interdependence model and actor-partner interdependence mediation model were used to analyze the data. RESULTS: Patients' symptom burden had an actor effect on their own depressive symptoms and a partner effect on their caregivers' depressive symptoms. Similarly, caregivers' caregiving burden had an actor effect on their own depressive symptoms and a partner effect on patients' depressive symptoms. The actor effects between burden and depressive symptoms were partially mediated by their own perceived stress in heart failure patient-caregiver dyads. Furthermore, the partner effect between caregivers' caregiving burden and patients' depressive symptoms was completely mediated by patients' perceived stress. CONCLUSIONS: Patients' symptom burden and caregivers' caregiving burden aggravated their depressive symptoms by increasing their own perceived stress. Moreover, patients' symptom burden led to caregivers' depressive symptoms, and caregivers' caregiving burden contributed to patients' depressive symptoms through patients' perceived stress. These interdependent relationships suggest that dyadic interventions focused on reducing burden and perceived stress may be beneficial for relieving depressive symptoms in heart failure patient-caregiver dyads.