Eliciting a value set for the Swedish Capability-Adjusted Life Years instrument (CALY-SWE)
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Published:2023-09-11
Issue:1
Volume:33
Page:59-72
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ISSN:0962-9343
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Container-title:Quality of Life Research
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language:en
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Short-container-title:Qual Life Res
Author:
Meili Kaspar WalterORCID, Mulhern BrendanORCID, Ssegonja RichardORCID, Norström FredrikORCID, Feldman InnaORCID, Månsdotter Anna, Hjelte JanORCID, Lindholm LarsORCID
Abstract
Abstract
Purpose
Our aim was to elicit a value set for Capability-Adjusted Life Years Sweden (CALY-SWE); a capability-grounded quality of life instrument intended for use in economic evaluations of social interventions with broad consequences beyond health.
Methods
Building on methods commonly used in the quality-adjusted life years EQ-5D context, we collected time-trade off (TTO) and discrete choice experiment (DCE) data through an online survey from a general population sample of 1697 Swedish participants. We assessed data quality using a score based on the severity of inconsistencies. For generating the value set, we compared different model features, including hybrid modeling of DCE and TTO versus TTO data only, censoring of TTO answers, varying intercept, and accommodating for heteroskedasticity. We also assessed the models’ DCE logit fidelity to measure agreement with potentially less-biased DCE data. To anchor the best capability state to 1 on the 0 to 1 scale, we included a multiplicative scaling factor.
Results
We excluded 20% of the TTO answers of participants with the largest inconsistencies to improve data quality. A hybrid model with an anchor scale and censoring was chosen to generate the value set; models with heteroskedasticity considerations or individually varying intercepts did not offer substantial improvement. The lowest capability weight was 0.114. Health, social relations, and finance and housing attributes contributed the largest capability gains, followed by occupation, security, and political and civil rights.
Conclusion
We elicited a value set for CALY-SWE for use in economic evaluations of interventions with broad social consequences.
Funder
Forskningsrådet om Hälsa, Arbetsliv och Välfärd Umea University
Publisher
Springer Science and Business Media LLC
Subject
Public Health, Environmental and Occupational Health
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