Choosing vs. allocating:discrete choice experiments and constant-sum paired comparisons for the elicitation of societal preferences

Skedgel, Chris D, Wailoo, Allan J and Akehurst, Ron L (2015) Choosing vs. allocating:discrete choice experiments and constant-sum paired comparisons for the elicitation of societal preferences. Health Expectations, 18 (5). 1227–1240. ISSN 1369-6513

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Abstract

BACKGROUND: There is growing evidence of a reluctance to allocate health care solely on the basis of maximizing quality-adjusted life years (QALYs). Stated preference methods can be used to elicit preferences for efficiency vs. equity in the allocation of health-care resources. OBJECTIVE: To compare discrete choice experiment (DCE) and constant-sum paired comparison (CSPC) methods for eliciting societal preferences. METHODS: Over a series of choice pairs, DCE respondents allocated a fixed budget to one preferred group and CSPC respondents allocated budget percentages between the groups. Questionnaires were compared in terms of completion rates, preference consistency, dominant preferences and derived attribute importance. RESULTS: There was no significant difference in the proportions that rated the questionnaires somewhat or extremely difficult, but a significantly greater proportion completed the DCE compared to the CSPC. Preference consistency was also higher in the DCE. The incidence of dominant preferences, including for aggregate QALYs, was low and not significantly different between questionnaires. Similarly, no CSCP respondents equalized budgets or outcomes in every task. Final health state was the most important attribute in both questionnaires, but the rankings diverged for the other attributes. Notably, the total patients' treated attribute was important in the CSPC but insignificant in the DCE, perhaps reflecting a 'prominence effect'. CONCLUSIONS: Despite lower completion rates and preference consistency, CSPC may offer advantages over DCE in eliciting preferences over the distribution of resources and/or outcomes as well as attribute levels, avoiding extreme 'all-or-nothing' distributions and possibly aligning respondent attention more closely with a societal perspective.

Item Type: Article
Additional Information: © 2013 John Wiley & Sons Ltd.
Uncontrolled Keywords: constant-sum paired comparisons,discrete choice experiments,societal preferences,stated preference methods,choosin
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Depositing User: Pure Connector
Date Deposited: 21 Jan 2015 12:44
Last Modified: 21 Apr 2020 23:47
URI: https://ueaeprints.uea.ac.uk/id/eprint/51920
DOI: 10.1111/hex.12098

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