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Qualitative and Quantitative Analysis of Interviewer Help Answering the Time Tradeoff

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  • Yvette Edelaar-Peeters
  • Anne M. Stiggelbout
  • Wilbert B. Van Den Hout

Abstract

Objectives. The time tradeoff (TTO) is an important method to directly obtain health utilities. Challenges of the TTO are, among others, “nontraders†and illogical answers. In TTO interviews, these challenges are resolved by the interviewer. In web-based TTOs, training procedures and logical checks are used based on the views of the researchers. As web-based TTOs will be used more often in the future, we investigated how respondents arrive at their ratings to determine the help they require. Methods. In 2 earlier studies performed by this research group, respondents valued 6 EQ-5D states on a TTO. Respondents were asked to think out loud, and all interviews were audiotaped. A random selection of these interviews were transcribed and double-coded by two independent raters, using a priori and inductive coding until saturation was reached. Based on the retrieved mistakes and comments, a list of frequently asked questions (FAQ) was developed. Results. In total, 91 interviews were coded. In all, 85% made at least 1 mistake, 41% made a misreading/miscalculation, 70% misunderstood the tradeoff, 27% misunderstood the EQ-5D dimensions, 29% misunderstood the scenario, 45% made a comment about the TTO, and 43% expressed frustration. More misunderstandings were reported in the Peeters study, which was performed in a realistic setting, whereas the van Osch study was conducted in a more ideal setting. Misunderstandings of the scenario were mosly reported by patients. Conclusions. Almost all respondents need interviewer help. This may have implications for the validity of interviewer-based TTO elicitations when social acceptability bias is an issue or with explicit hypothesis and the interviewer is not blinded. The FAQ list can be used to standardize interviewer help or as a help function in a web-based TTO.

Suggested Citation

  • Yvette Edelaar-Peeters & Anne M. Stiggelbout & Wilbert B. Van Den Hout, 2014. "Qualitative and Quantitative Analysis of Interviewer Help Answering the Time Tradeoff," Medical Decision Making, , vol. 34(5), pages 655-665, July.
    • Handle: RePEc:sae:medema:v:34:y:2014:i:5:p:655-665
    DOI: 10.1177/0272989X14524989
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    References listed on IDEAS

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    1. Dolan, Paul, 2000. "The measurement of health-related quality of life for use in resource allocation decisions in health care," Handbook of Health Economics, in: A. J. Culyer & J. P. Newhouse (ed.), Handbook of Health Economics, edition 1, volume 1, chapter 32, pages 1723-1760, Elsevier.
    2. Angela Robinson & Anne Spencer, 2006. "Exploring challenges to TTO utilities: valuing states worse than dead," Health Economics, John Wiley & Sons, Ltd., vol. 15(4), pages 393-402, April.
    3. F. E. van Nooten & X. Koolman & W. B. F. Brouwer, 2009. "The influence of subjective life expectancy on health state valuations using a 10 year TTO," Health Economics, John Wiley & Sons, Ltd., vol. 18(5), pages 549-558, May.
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    1. Tonya Moen Hansen & Knut Stavem & Kim Rand, 2023. "Completing the time trade-off with respondents who are older, in poorer health or with an immigrant background in an EQ-5D-5L valuation study," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 24(6), pages 877-884, August.
    2. Ruixuan Jiang & Thomas Kohlmann & Todd A. Lee & Axel Mühlbacher & James Shaw & Surrey Walton & A. Simon Pickard, 2021. "Increasing respondent engagement in composite time trade-off tasks by imposing three minimum trade-offs to improve data quality," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 22(1), pages 17-33, February.
    3. Finch, Aureliano Paolo & Meregaglia, Michela & Ciani, Oriana & Roudijk, Bram & Jommi, Claudio, 2022. "An EQ-5D-5L value set for Italy using videoconferencing interviews and feasibility of a new mode of administration," Social Science & Medicine, Elsevier, vol. 292(C).
    4. Sahar Al Shabasy & Bram Roudijk & Maggie Abbassi & Aureliano Finch & Elly Stolk & Samar Farid, 2023. "The Egyptian EQ-5D-5L Extensive Pilot Study: Lessons Learned," PharmacoEconomics, Springer, vol. 41(3), pages 329-338, March.

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