A comparison of the performance of the EQ-5D and SF-6D for individuals aged >or= 45 years

Barton, Garry R., Sach, Tracey H., Avery, Anthony J., Jenkinson, Claire, Doherty, Michael, Whynes, David K. and Muir, Kenneth R. (2008) A comparison of the performance of the EQ-5D and SF-6D for individuals aged >or= 45 years. Health Economics, 17 (7), 815-832. (doi:10.1002/hec.1298).

Abstract

We sought to compare the performance of the EQ-5D and SF-6D with regard to the criteria of practicality, convergent validity, and construct validity, the level of agreement between the two measures was also assessed. Responses from 1865 individuals aged >or= 45 years in one general practice were analysed. Of these, 93.1% completed the EQ-5D, compared with 86.4% for the SF-6D, where individuals who were older, female, of a lower occupational skill level, from an area of lower deprivation, or used prescribed medication were significantly less likely to complete the SF-6D. The performance of both measures was comparable with regard to both convergent and construct validities, as both the EQ-5D and SF-6D scores were closely related to scores on the EuroQol visual analogue scale (VAS) (p<0.001) and able to discriminate between people who did and did not take: (i) analgesics and (ii) other prescribed medication. Despite EQ-5D and SF-6D scores being highly correlated (p<0.001), individuals who were healthier (according to the VAS) had higher mean scores on the EQ-5D (p<0.001), whereas less healthy individuals had higher mean scores on the SF-6D (individuals with knee pain, osteoarthritis, back pain, rheumatoid arthritis, and hip pain had significantly lower mean scores on the EQ-5D, p<0.001).

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Contributors

Author: Tracey H. Sach

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