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dc.creatorRamos-Goñi, J.M. (Juan M.)-
dc.creatorCraig, B. (Benjamin)-
dc.creatorOppe, M. (Mark)-
dc.creatorRamallo-Fariña, Y. (Yolanda)-
dc.creatorPinto‑Prades, J.L. (José Luis)-
dc.creatorLuo, N. (Nan)-
dc.creatorRivero-Arias, O. (Oliver)-
dc.identifier.citationRamos-Goñi, J.M. (Juan M.); Craig, B. (Benjamin); Oppe, M. (Mark); et al. "Handling data quality issues to estimate the Spanish EQ-5D-5L value set using a hybrid interval regression approach". Value in health. 21 (5), 2018, 596 - 604es
dc.description.abstractBackground The Spanish five-level EuroQol five-dimensional questionnaire (EQ-5D-5L) valuation study was the first to use the EuroQol Valuation Technology protocol, including composite time trade-off (C-TTO) and discrete choice experiments (DCE). In this study, its investigators noticed that some interviewers did not fully explain the C-TTO task to respondents. Evidence from a follow-up study in 2014 confirmed that when interviewers followed the protocol, the distribution of C-TTO responses widened. Objectives To handle the data quality issues in the C-TTO responses by estimating a hybrid interval regression model to produce a Spanish EQ-5D-5L value set. Methods Four different models were tested. Model 0 integrated C-TTO and DCE responses in a hybrid model and models 1 to 3 altered the interpretation of the C-TTO responses: model 1 allowed for censoring of the C-TTO responses, whereas model 2 incorporated interval responses and model 3 included the interviewer-specific protocol violations. For external validation, the predictions of the four models were compared with those of the follow-up study using the Lin’s concordance correlation coefficient. Results This stepwise approach to modeling C-TTO and DCE responses improved the concordance between the valuation and follow-up studies (concordance correlation coefficient: 0.948 [model 0], 0.958 [model 1], 0.952 [model 2], and 0.989 [model 3]). We recommend the estimates from model 3, because its hybrid interval regression model addresses the data quality issues found in the valuation study. Conclusions Protocol violations may occur in any valuation study; handling them in the analysis can improve external validity. The resulting EQ-5D-5L value set (model 3) can be applied to inform Spanish health technology assessments.es_ES
dc.publisherElsevier BVes_ES
dc.subjectHealth status indexlifees_ES
dc.subjectValuationquality of lifees_ES
dc.titleHandling data quality issues to estimate the Spanish EQ-5D-5L value set using a hybrid interval regression approaches_ES
dc.description.noteThis is an open access article under the CC BY-NC-ND license (
dadun.citation.publicationNameValue in healthes_ES

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