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What is the test-retest reliability of the Malay version of the Hypertension Self-Care Profile self efficacy assessment tool? A validation study in primary care
  1. Kai Cong Seow1,
  2. Diana Mohamed Yusoff2,
  3. Yi Ling Eileen Koh2,
  4. Ngiap Chuan Tan2,3
  1. 1 National University Singapore Yong Loo Lin School of Medicine, Singapore, Singapore
  2. 2 SingHealth Polyclinics, Singapore, Singapore
  3. 3 Duke NUS Medical School, Singapore, Singapore
  1. Correspondence to Dr Ngiap Chuan Tan; tan.ngiap.chuan{at}


Objectives Self-efficacy and self-care measures are key attributes to optimal control of essential hypertension. Self-efficacy can be measured by the Hypertension Self-Care Profile (HTN-SCP) tool but its utility is dependent on the literacy and understanding of the subjects. A Malay version of the HTN-SCP Tool was developed to assess self-efficacy of Malay-literate patients with hypertension in the multi-ethnic Asian population in Singapore. The study aimed to determine the test-retest reliability of this tool which has been translated in Malay language.

Methods and Material 145 Malay-literate patients, aged 41-70 years, with essential hypertension were recruited in a polyclinic (primary care clinic) in Singapore. Forty-three percent of them completed both the first and second HTN SCP tool online, with a period of two weeks in between. The Cronbach’s alpha and Intra-class correlation coefficient (ICC) were computed to assess its test-retest reliability and internal consistency.

Results The Cronbach’s alpha/ICC for “Behavior” (0.851/0.664)), “Motivation” (0.928/0.655) and “Self-efficacy” (0.945/0.682) domains showed high internal consistency, fair to good reliability and stability. No floor or ceiling effect was found for the "behavior" and "motivation" domains. However, the borderline ceiling effect (15.2) for "self-efficacy" suggested limited discriminating power of the tool for patients with high self-efficacy. Positive association was shown between the HTN-SCP score and reported self-care measures but it was not statistically significant.

Conclusion Overall, the translated HTN-SCP tool showed satisfactory test-retest reliability and internal consistency amongst the Malay-literate study population. Further research is needed for its application in general practice to identify patients with low self-efficacy for possible intervention.

  • hypertension
  • self-care
  • tool
  • malay

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  • Contributors NCT designed the study protocol. DBMY and KCS were involved in the recruitment and administration of the questionnaire. YLEK was involved in data analysis. NCT drafted the manuscript while all authors reviewed and improved the final manuscript before submission.

  • Funding None.

  • Competing interests None declared.

  • Ethics approval Centralised Institutional Review Board.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement Anonymous data will be shared upon request if researchers/reviewers are interested.

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