Abstract
Background: The psychometric properties of the Korean version of the revised Self-care of Heart Failure Index (K-SCHFI v7.2) remain undetermined. Objectives: To examine validity (construct and predictive validity) and reliability of the 29-item K-SCHFI v7.2 in Korean patients with heart failure (HF). Methods: Using a cross-sectional, descriptive design, data on self-care and depressive symptoms were obtained for this psychometric testing. Construct validity was tested with confirmatory factor analysis (CFA) and predictive validity was tested through relationships between each self-care scale and depressive symptoms. Reliability was tested with Cronbach’s alpha and McDonald’s omega coefficients. Results: Patients with HF participated from four university-affiliated hospitals in South Korea (N = 207; mean age, 59.67 ± 13.87 years; male, 63.6%). CFA supported the construct validity of the K-SCHFI v7.2 (CFI from .931 to .977; RMSEA from .033 to .065), specifically, Self-Care Maintenance (CFI = .950, TLI = .931, SRMR = .063, RMSEA = .048); Symptom Perception (CFI = .931, TLI = .908, SRMR = .047, RMSEA = .065); and Self-Care Management (CFI = .977, TLI = .966, SRMR = .040, RMSEA = .033). Validity was further supportive with the relationships between the self-care and depressive symptoms, with patients with more depressed symptoms having poorer self-maintenance (t = 2.34, p = .018) and self-management (t = 2.00, p = .048). Reliability estimates were marginally satisfactory, with Cronbach's α and McDonald’s omega coefficients of .66 and .72 (Self-Care Maintenance), .78 and .82 (Symptom Perception), and .66 and .70 (Self-Care Management), respectively. Conclusion: Validity of the revised K-SCHFI v7.2 was supportive with a sound model fit and the relations to the depressive symptoms. Reliability of each scale was marginally supportive through the alpha and McDonald’s coefficients, while validation is required using a larger sample.
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