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Quality of Life Research
Gepubliceerd in: Quality of Life Research 9/2022

25-05-2022

Discrete choice experiment with duration versus time trade-off: a comparison of test–retest reliability of health utility elicitation approaches in SF-6Dv2 valuation

Auteurs: Shitong Xie, Jing Wu, Gang Chen

Gepubliceerd in: Quality of Life Research | Uitgave 9/2022

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Abstract

Objectives

To evaluate and compare the test–retest reliability of discrete choice experiments with duration (DCETTO) and time trade-off (TTO) in the Chinese SF-6Dv2 valuation study.

Methods

During face-to-face interviews, a representative sample of the Chinese general population completed 8 TTO tasks and 10 DCETTO tasks. Retest interviews were conducted after two weeks. For both DCETTO and TTO, the consistency of raw responses between the two tests was firstly evaluated at the individual level. Regressions were conducted to investigate the association between the test–retest reliability and the respondents’ characteristics and the severity of health states. Consistency was then analyzed at the aggregate level by comparing the rank order of the coefficients of dimensions.

Results

In total, 162 respondents (51.9% male; range 18–80 years) completed the two tests. The intraclass correlations coefficient 0.958 for TTO, with identical values accounting for 59.3% of observations. 76.4% of choices were identical for DCETTO, with a Kappa statistic of 0.528. Respondents’ characteristics had no significant impact while the severity of health states valued in TTO and DCETTO tasks had a significant impact on the test–retest reliability. Both approaches produced relatively stable rank order of dimensions in constrained model estimations between test and retest data.

Conclusions

Individual responses of both approaches are relatively stable over time. The rank orders of dimensions in model estimations between test and retest for TTO and DCETTO are also consistent. The differences of utility estimation between the two tests for DCETTO need to be further investigated based on a larger sample size.
vorige artikel Heterogeneity in preferences for outcomes of integrated care for persons with multiple chronic diseases: a latent class analysis of a discrete choice experiment
volgende artikel Establishing content validity of LIMB-Q Kids: a new patient-reported outcome measure for lower limb deformities
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Voetnoten
1
The process of the first interview was as follows [21]: respondents (1) completed inclusion and quota questions, to confirm s/he was eligible; (2) reported their health using the SF-6Dv2; (3) completed the TTO and DCETTO tasks with the order randomized; and (4) reported a series of social-demographic characteristics.
 
2
For traditional DCE tasks, the distribution of relative preference for choice A versus B could be observed by evaluating the difference in the severity of the health states (i.e., the severity score of the health state) included in both choices [13]. However, this approach is not applicable in this study given there exists additional life duration dimension in the DCETTO task.
 
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Metagegevens
Titel
Discrete choice experiment with duration versus time trade-off: a comparison of test–retest reliability of health utility elicitation approaches in SF-6Dv2 valuation
Auteurs
Shitong Xie
Jing Wu
Gang Chen
Publicatiedatum
25-05-2022
Uitgeverij
Springer International Publishing
Gepubliceerd in
Quality of Life Research / Uitgave 9/2022
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-022-03159-2

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