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A preference-based index for the SF-12.
Health Econ. 15, 553-564 (2006)
Background: The SF-12 is a widely used generic measure of subjective health. As the scoring algorithms of the SF-12 do not include preference values, different approaches to assign a preference-based index are available that should be tested regarding their feasibility and validity.
Objectives: To develop a concept for a preference-based index for the SF-12 on the basis of multi-attribute decision analysis and to perform initial tests of its feasibility and validity in an empirical study.
Methods: A multi-attribute preference function for the SF-12 was developed, estimated and tested for validity. Two mail surveys (n = 100, 200) and an interview (n = 72) were conducted with women who had an operation for breast cancer. Visual analogue scale (VAS) and standard gamble (SG) measures elicited preference-based valuations.
Results: Eight attributes were identified in the SF-12. Validity tests showed an average difference of 8 VAS score points between directly measured and predicted values for given health states.
Conclusion: The initial results show that this approach might allow the direct assignment of a preference-based valuation to the SF-12. The quality of the psychometric features of the multi-attribute value function is encouraging. Future studies should test this concept more extensively, especially by determining parameters for a representative sample of the general population and by comparing performance with other approaches to value the SF-12.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
SF-12; preference-based valuation; utility; health index; multi-attrubute decision theory
ISSN (print) / ISBN
1057-9230
e-ISSN
1099-1050
Journal
Health Economics
Quellenangaben
Volume: 15,
Issue: 6,
Pages: 553-564
Publisher
Wiley
Non-patent literature
Publications
Reviewing status
Peer reviewed