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Article History

Accepted: 11 February 2025

First Online: 11 March 2025

Declarations

:

: Both authors are members of the EuroQol Research Group, and Bram Roudijk is employed by the EuroQol Research Foundation.

: This study was funded by the EuroQol Research Foundation (project no.: 1767-RA).

: The funders had no role in the design or conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; or the decision to submit the manuscript for publication.

: This study is based on secondary data.

: Not applicable.

: Not applicable.

: Not applicable.

: Secondary data are not available from the authors. Requests for data may be sent to the sources quoted in this paper.

: The STATA code is available from the lead author upon reasonable request. Views expressed by the authors in the publication do not necessarily reflect the views of the EuroQol Research Foundation.

: Both authors contributed to the study conception and design. Material preparation, data acquisition, and analysis were performed by both authors. The first draft of the manuscript was written by Henry Bailey, and both authors commented on previous versions of the manuscript. Both authors have read and approved the final manuscript.