Abstract 2504: Relationships Among Perceived Control, Depression, Functional Status, and Health-Related Quality of Life in Patients with Heart Failure
Introduction: Health-related quality of life (HRQOL) is an important outcome in patients with heart failure (HF). Prior research suggests that HRQOL may be influenced by the degree of perceived control, presence of depression, and level of functional status, but relationships among these variables have not been fully examined. The purpose of this study was to determine the relationships among perceived control, depression, functional status, and HRQOL in HF patients.
Hypotheses: H1: Perceived control, depression, and functional status will directly impact HRQOL. H2: Perceived control and depression will indirectly impact HRQOL through depression and/or functional status, respectively.
Methods and Results: Patients (N = 121, mean age 60 ± 12, NYHA class III/IV: 66%) provided data about their level of perceived control (Control Attitudes Scale-Revised), depression (Beck Depression Inventory II), functional status (Duke Activity Status Index), and HRQOL (Minnesota Living with Heart Failure). Structural equation modeling was used to test the hypotheses. Both hypotheses were supported (Figure 1⇓): higher perceived control, less depression, and better functional status were related to better HRQOL; higher perceived control was related to less depression, and less depression was related to better functional status and in turn better HRQOL. The proposed model explained 62% of the variance in HRQOL.
Conclusions: Perceived control, depression, and functional status significantly affected HRQOL in patients with HF. This model offers several targets for intervention in HF patients that may influence HRQOL.