| Title: |
Head-to-head comparison of health-state values derived by a probabilistic choice model and scores on a visual analogue scale |
| Authors: |
Krabbe, PFM; Stolk, EA; Devlin, NJ; Xie, F; Quik, EH; Pickard, AS |
| Publisher Information: |
Springer Science and Business Media LLC |
| Publication Year: |
2017 |
| Collection: |
The University of Melbourne: Digital Repository |
| Description: |
BACKGROUND: 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). METHODS: 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. RESULTS: 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. CONCLUSION: 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. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| ISSN: |
1618-7598 |
| Relation: |
https://hdl.handle.net/11343/246145 |
| Availability: |
https://hdl.handle.net/11343/246145 |
| Rights: |
https://creativecommons.org/licenses/by/4.0 ; CC BY |
| Accession Number: |
edsbas.AB4FA5E9 |
| Database: |
BASE |