We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Mapping and direct valuation: do they give equivalent EQ-5D-5L index scores?
- Authors
Nan Luo; Yin Bun Cheung; Raymond Ng; Chun Fan Lee; Luo, Nan; Cheung, Yin Bun; Ng, Raymond; Lee, Chun Fan
- Abstract
<bold>Objective: </bold>Utility values of health states defined by health-related quality of life instruments can be derived from either direct valuation ('valuation-derived') or mapping ('mapping-derived'). This study aimed to compare the utility-based EQ-5D-5L index scores derived from the two approaches as a means to validating the mapping function developed by van Hout et al for the EQ-5D-5L instrument.<bold>Methods: </bold>This was an observational study of 269 breast cancer patients whose EQ-5D-5L index scores were derived from both methods. For comparing discriminatory ability and responsiveness to change, multivariable regression models were used to estimate the effect sizes of various health indicators on the index scores. Agreement and test-retest reliability were examined using intraclass correlation coefficient (ICC). Whenever appropriate, the 90% confidence intervals (90% CI) were compared to predefined equivalence margins.<bold>Results: </bold>The mean difference in and ICC between the valuation- and mapping-derived EQ-5D-5L index scores were 0.015 (90% CI = 0.006 to 0.024) and 0.915, respectively. Discriminatory ability and responsiveness of the two indices were equivalent in 13 of 15 regression analyses. However, the mapping-derived index score was lower than the valuation-derived index score in patients experiencing extreme health problems, and the test-retest reliability of the former was lower than the latter, for example, their ICCs differed by 0.121 (90% CI = 0.051 to 0.198) in patients who reported no change in performance status in the follow-up survey.<bold>Conclusion: </bold>This study provided the first evidence supporting the validity of the mapping function for converting EQ-5D-5L profile data into a utility-based index score.
- Subjects
QUALITY of life; HEALTH status indicators; BREAST cancer patients; INTRACLASS correlation; REGRESSION analysis; BREAST tumor treatment; MENTAL health; BREAST tumors; PSYCHOMETRICS; COMPARATIVE studies; RESEARCH methodology; MEDICAL cooperation; HEALTH outcome assessment; QUESTIONNAIRES; RESEARCH; RESEARCH evaluation; EVALUATION research; EQUIPMENT &; supplies; CANCER &; psychology
- Publication
Health & Quality of Life Outcomes, 2015, Vol 13, Issue 1, p1
- ISSN
1477-7525
- Publication type
journal article
- DOI
10.1186/s12955-015-0361-y