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- Title
Head-to-head comparison of health-state values derived by a probabilistic choice model and scores on a visual analogue scale.
- Authors
Krabbe, Paul; Stolk, Elly; Devlin, Nancy; Xie, Feng; Quik, Elise; Pickard, A.; Krabbe, Paul F M; Stolk, Elly A; Devlin, Nancy J; Quik, Elise H; Pickard, A Simon
- Abstract
<bold>Background: </bold>Health states were quantified based on discrete choice (DC) modeling and visual analogue scale (VAS) values using the five-level version of the EQ-5D (EQ-5D-5L). The aim of this study was to determine the extent of the relationship between DC derived values (indirect method) and VAS values (direct method).<bold>Methods: </bold>Data were collected in Canada, the United Kingdom, the Netherlands, and the United States. Respondents were asked to perform paired comparisons between two EQ-5D-5L health states for DC. In total, 400 different EQ-5D-5L states were included. After each DC task, respondents were prompted to score the two states one after another on a VAS. Intraclass correlation coefficients were calculated between DC and VAS values and illuminating graphs were designed.<bold>Results: </bold>Approximately 400 respondents participated from each country. High similarity [individual intraclass correlation coefficients (ICC) >0.85] of DC and moderate correspondence of VAS values were observed for the four countries. Cross-country comparison of DC values shows a nonlinear relationship to the VAS values.<bold>Conclusion: </bold>EQ-5D-5L derived DC and VAS values show a close but nonlinear relationship. Given the obvious biases associated with the VAS, DC methods based on ordinal responses may be a better alternative.
- Subjects
CANADA; NETHERLANDS; PROBABILISM; DISCRETE choice models; DECISION making; VISUAL analytics; DATA visualization; HEALTH status indicators; MATHEMATICAL models; QUALITY of life; QUESTIONNAIRES; THEORY; VISUAL analog scale
- Publication
European Journal of Health Economics, 2017, Vol 18, Issue 8, p967
- ISSN
1618-7598
- Publication type
journal article
- DOI
10.1007/s10198-016-0841-y