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Developing a New Version of the SF-6D Health State Classification System From the SF-36v2: SF-6Dv2.
- Source :
-
Medical care [Med Care] 2020 Jun; Vol. 58 (6), pp. 557-565. - Publication Year :
- 2020
-
Abstract
- Objective: The objective of this study was to develop the classification system for version of the SF-6D (SF-6Dv2) from the SF-36v2. SF-6Dv2 is an improved version of SF-6D, one of the most widely used generic measures of health for the calculation of quality-adjusted life years.<br />Study Design and Setting: A 3-step process was undertaken to generate a new classification system: (1) factor analysis to establish dimensionality; (2) Rasch analysis to understand item performance; and (3) tests of differential item function. To evaluate robustness, Rasch analyses were performed in multiple subsets of 2 large cross-sectional datasets from recently discharged hospital patients and online patient samples.<br />Results: On the basis of factor analysis, other psychometric evidence, cross-cultural considerations, and amenability to valuation, the 6-dimension classification used in SF-6D was maintained. SF-6Dv2 resulted in the following modifications to SF-6D: a simpler classification of physical function with clearer separation between levels; a more detailed 5-level description of role limitations; using negative wording to describe vitality; and using pain severity rather than pain interference.<br />Conclusions: The SF-6Dv2 classification system describes more distinct levels of health than SF-6D, changes the descriptions used for a number of dimensions and provides clearer wording for health state valuation. The second stage of the study has developed a utility value set using discrete choice methods so that the measure can be used in health technology assessment. Further work should investigate the psychometric characteristics of the new instrument.
- Subjects :
- Adolescent
Adult
Aged
Cost-Benefit Analysis standards
Cross-Sectional Studies
Cultural Competency
Factor Analysis, Statistical
Female
Humans
Male
Middle Aged
Pain epidemiology
Psychometrics
Quality-Adjusted Life Years
Reproducibility of Results
Social Participation
Socioeconomic Factors
Young Adult
Cost-Benefit Analysis methods
Health Status
Mental Health
Physical Functional Performance
Surveys and Questionnaires standards
Subjects
Details
- Language :
- English
- ISSN :
- 1537-1948
- Volume :
- 58
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Medical care
- Publication Type :
- Academic Journal
- Accession number :
- 32412942
- Full Text :
- https://doi.org/10.1097/MLR.0000000000001325