Luana Claudia Jacoby Silveira1, Maddalena De Maria2, Victoria Vaughan Dickson3, Christiane Wahast Avila4, Eneida Rejane Rabelo-Silva5, Ercole Vellone2. 1. Graduate Program in Health Sciences: Cardiology and Cardiovascular Sciences, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil. 2. Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Rome, Italy. 3. The Pless Center for Nursing Research, New York University, Rory Meyers College of Nursing, United States. 4. Graduate Program in Nursing, Universidade Federal do Rio Grande do Sul - School of Nursing and Hospital de Clínicas de Porto Alegre - Cardiology Division, Brazil. 5. Graduate Program in Health Sciences: Cardiology and Cardiovascular Sciences, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil; Graduate Program in Nursing, Universidade Federal do Rio Grande do Sul - School of Nursing and Hospital de Clínicas de Porto Alegre - Cardiology Division, Brazil. Electronic address: eneidarabelo@gmail.com.
Abstract
BACKGROUND: Poor self-care in patients with hypertension is associated with worse patient outcomes. The Self-Care of Hypertension Inventory (SC-HI) measures self-care in patients with hypertension and includes three scales: self-care maintenance, which measures adherence to prescribed treatments and behaviors; self-care management, which evaluates the responses to signs and symptoms of high blood pressure; and self-care confidence, which measures self-efficacy in dealing with the entire process. OBJECTIVE: To test the psychometric characteristics of the Brazilian version of the SC-HI. METHODS: We enrolled a sample of 360 patients with hypertension and performed confirmatory factor analysis (CFA) and exploratory factor analysis (EFA) to test the factorial structure of the SC-HI and computed the factor score determinacy coefficient to evaluate the SC-HI internal consistency reliability. RESULTS: The sample was predominantly female (65%), mean age of 65 years (SD = 10), white (70%). The self-care maintenance scale resulted in a unidimensional scale, with supportive fit indices (CFI = 0.901, RMSEA = 0.048); the self-care management did not reflect the original factorial structure and had unsupportive fit indices. EFA showed a different factorial solution in reference to the original study. Finally, the self-care confidence scale resulted in a unidimensional scale with supportive fit indices (CFI = 0.940, RMSEA = 0.093). The reliability of the self-care maintenance, management, and confidence scales resulted in factor score determinacy coefficients of 0.83, 0.78, and 0.97 respectively. CONCLUSION: This study shows that the SC-HI is a valid and reliable tool to measure self-care in patients with hypertension among the Brazilian population.
BACKGROUND: Poor self-care in patients with hypertension is associated with worse patient outcomes. The Self-Care of Hypertension Inventory (SC-HI) measures self-care in patients with hypertension and includes three scales: self-care maintenance, which measures adherence to prescribed treatments and behaviors; self-care management, which evaluates the responses to signs and symptoms of high blood pressure; and self-care confidence, which measures self-efficacy in dealing with the entire process. OBJECTIVE: To test the psychometric characteristics of the Brazilian version of the SC-HI. METHODS: We enrolled a sample of 360 patients with hypertension and performed confirmatory factor analysis (CFA) and exploratory factor analysis (EFA) to test the factorial structure of the SC-HI and computed the factor score determinacy coefficient to evaluate the SC-HI internal consistency reliability. RESULTS: The sample was predominantly female (65%), mean age of 65 years (SD = 10), white (70%). The self-care maintenance scale resulted in a unidimensional scale, with supportive fit indices (CFI = 0.901, RMSEA = 0.048); the self-care management did not reflect the original factorial structure and had unsupportive fit indices. EFA showed a different factorial solution in reference to the original study. Finally, the self-care confidence scale resulted in a unidimensional scale with supportive fit indices (CFI = 0.940, RMSEA = 0.093). The reliability of the self-care maintenance, management, and confidence scales resulted in factor score determinacy coefficients of 0.83, 0.78, and 0.97 respectively. CONCLUSION: This study shows that the SC-HI is a valid and reliable tool to measure self-care in patients with hypertension among the Brazilian population.