Validity and reliability of the self-care of hypertension inventory (SC-HI) in a Brazilian population

Luana Claudia Jacoby Silveira, Maddalena De Maria, Victoria Vaughan Dickson, Christiane Wahast Avila, Eneida Rejane Rabelo-Silva, Ercole Vellone

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)518-523
Number of pages6
JournalHeart and Lung
Volume49
Issue number5
DOIs
StatePublished - Sep 1 2020

Keywords

  • Behavior rating scale
  • Hypertension
  • Self-care

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine
  • Cardiology and Cardiovascular Medicine

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