Whose Time Trade-Off Should Be Used? Anchoring Discrete Choice Experiment Latent Utilities in Health State Valuation

•In previous studies, discrete choice experiment (DCE) responses were usually collected through online surveys, whereas time trade-off (TTO) responses were elicited through face-to-face interviews on a different group of respondents.•Nevertheless, there is no evidence showing the impact of using TTOs from a different sample for anchoring. This study was, therefore, aimed to compare anchored DCE values using own or others’ TTO responses.•When anchoring DCE-derived latent utilities onto the health utility scale, respondents’ own TTO data would be preferred to TTO data obtained from a different sample.