Relationships of person-related, problem-related, and environment-related factors to self-care behaviours and the mediating role of self-confidence among patients with heart failure: Cross-sectional analysis of structural equation modelling

Promoting self-care behaviours in heart failure management is an important goal and challenge for healthcare systems worldwide. Using the situation-specific theory of heart failure self-care, this study examined the relationships of person-related, problem-related, and environment-related factors to self-care behaviours and the mediating role of self-care confidence in these relationships.We analysed the baseline data from a previous randomised controlled trial study involving 213 patients with heart failure. Structural equation modelling was used to test our hypothesised model that included age, income, education, depression, anxiety, number of comorbidities, social support, self-care confidence, and self-care behaviours. Depression and anxiety were measured by the Hospital Anxiety and Depression Scale. Social support was measured by the Short Form of the Social Support Questionnaire satisfaction subscale. The Self-Care of Heart Failure Index (version 6.2) was used to assess self-care confidence and self-care behaviours (i.e., self-care maintenance and self-care management).The final model included age, depression, social support, and self-care confidence as independent variables. Age had a direct relationship with self-care maintenance (β = 0.235, p < 0.001) but not self-care management (β = 0.067, p = 0.179); better social support was directly associated with higher levels of self-care confidence (β = 0.267, p < 0.001); and higher levels of self-care confidence were associated with better self-care maintenance (β = 0.573, p < 0.001) and self-care management (β = 0.683, p < 0.001). The result showed an indirect relationship between social support and self-care maintenance through the mediator of self-care confidence (β = 0.153, p < 0.001), as well as an indirect relationship between social support and self-care management through self-care confidence (β = 0.182, p < 0.001).Satisfactory social support can increase self-care confidence, thereby increasing self-care maintenance and management. The findings of this study also implied that self-care maintenance can increase with increasing age. Future interventions directly targeting assessment and management of self-care confidence, available social support, and the age of patients may help enhance their heart failure self-care behaviours.