AUTHOR=Ma Guiyue , Zhong Zhuqing , Duan Yinglong , Shen Zhiying , Qin Ning , Hu Dehua 

TITLE=Development and Validation of a Self-Quantification Scale for Patients With Hypertension

JOURNAL=Frontiers in Public Health

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2022.849859

DOI=10.3389/fpubh.2022.849859

ISSN=2296-2565

ABSTRACT=Background: The self-management ability of patients with hypertension is poor, and self-quantification increases gradually with the development of electronic. Self-quantification for patients with hypertension has important implications for individual health.
Methods: The instrument was developed based on protection motivation theory with literature review, qualitative interview and focus group discussions and pilot testing. A total of 360 patients with hypertension were investigated using the scale. The psychometric properties of the scale were evaluated with respect to validity and reliability employing internal consistency reliability, split-half reliability, test-retest reliability, content validity (S-CVI/Ave and I-CVI) and construct validity (exploratory factor analysis and confirmatory factor analysis).
Results: The final scale had 30 items with seven sub-domains. The Cronbach's α for all domains was 0.900 with a range of 0.817-0.938. The split-half reliability coefficient for all domains was 0.743 with a range of 0.700-0.888. The test-retest reliability coefficient for all domains was 0.880 with a range of 0.849-0.943. The S-CVI/Ave for all domains was 0.922 with a range of 0.906- 0.950, and the I-CVI of each item was a range of 0.800-1.000. The result of confirmatory factor analysis of this scale showed that χ2/df was 2.499, RMSEA = 0.065, GFI=0.865, NFI=0.84, IFI=0.934, TLI=0.914, CFI=0.933, RFI=0.865. The Pearson’s coefficients between the total scale and its each domain were ranging from 0.347 to 0.695, and each domain ranged from 0.130 to 0.481.
Conclusion: The scale proved has good validity, reliability and can be used as the self-quantification scale for patients with hypertension.