Psychometric evaluation of the Health-Risk Attitude Scale (HRAS-13)
Assessing the reliability, dimensionality and validity in the general population and a patient population
Objectives: The aim of this study was to assess the reliability, dimensionality and validity of the self-report questionnaire Health-Risk Attitude Scale (HRAS-13) in a sample of the general population and a patient population.
Methods: Sample 1 (n = 930) was recruited from the general population aged 18–65 years in the Netherlands. Sample 2 (n = 486) was recruited from the population of knee and hip osteoarthritis patients aged 45 and over, also from the Netherlands. Reliability was assessed using Cronbach’s alpha, average inter-item correlation and item-total correlations. Dimensionality was examined using confirmatory factor analysis (CFA), principal component analysis (PCA) and bifactor analysis. Validity was assessed by performing known-group analysis using ANOVA tests.
Results: Cronbach’s alphas of the HRAS-13 were 0.73 in sample 1 and 0.69 in sample 2. Reliability and dimensionality analyses differed slightly between the samples, and suggest that a short version of the HRAS may capture a general component of health-risk attitude. Validity assessment of known groups showed that the HRAS-13 and a likely HRAS-6 distinguished between subgroups of respondents based on most of the assessed characteristics, but not all.
Discussion: These findings are a preliminary indication that the HRAS-13 is a promising multidimensional instrument for measuring health-risk attitude. However, further research in various samples on decisions where health risks play a role is warranted to confirm the dimensionality of the HRAS-13 and the items to be retained in a full or a shorter version.
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|Psychology & Health|
|Organisation||Health Technology Assessment|
Huls, S.P.I, van Osch, S.M.C, Brouwer, W.B.F, van Exel, N.J.A, & Stiggelbout, A.M. (2020). Psychometric evaluation of the Health-Risk Attitude Scale (HRAS-13). Psychology & Health. doi:10.1080/08870446.2020.1851689