Mapping the SF-12 to preference-based instruments: Convergent validity in a low-income, minority population

Peter Franks, Erica I. Lubetkin, Marthe R. Gold, Daniel J Tancredi

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

BACKGROUND. The profile-based SF-12 has a low respondent burden and is used widely in clinical settings to monitor health and evaluate programs. Deriving preference scores for the SF-12 health profile would permit its use in cost-effectiveness analyses. Previous mapping studies of SF family instruments to preference-based instruments have not examined convergent validity or performance in low-income, minority populations. OBJECTIVES. To map the SF-12 to the EuroQol (EQ-5D Index) and the Health Utilities Index Mark 3 (HUI3) in a low-income, predominantly minority sample. RESEARCH DESIGN. We used a cross-sectional survey data. SUBJECTS. We studied a convenience sample of 240 low-income, predominantly Latino and black patients attending a community health center in New York. MEASURES. We used separate regressions of the EQ-5D Index and HUI3 onto the physical (PCS-12) and mental (MCS-12) components of the SF-12 scores as measures. RESULTS. For the EQ-5D Index regression, the adjusted variance explained was 58% (boot-strap validation 95% confidence interval [CI], 46-66). For the HUI3 regression, the adjusted variance explained was 51% (bootstrap 95% CI, 39-59). The correlation coefficient between the 2 predicted measures was 0.96. The correlation of the predicted HUI3 with the EQ-5D Index (0.73) and the predicted EQ-5D Index with the HUI3 (0.70) exceeded that between the 2 original preference-based measures themselves (0.69). CONCLUSIONS. These pilot results suggest that the SF-12 could be successfully mapped to both the EQ-5D Index and HUI3, yielding preference-based scores that demonstrate convergent validity in a low-income, minority sample.

Original languageEnglish (US)
Pages (from-to)1277-1283
Number of pages7
JournalMedical Care
Volume41
Issue number11
DOIs
StatePublished - Nov 2003

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Keywords

  • EQ-5D
  • Health status
  • HUI Mark 3
  • Low-income
  • Minority
  • SF-12

ASJC Scopus subject areas

  • Nursing(all)
  • Public Health, Environmental and Occupational Health
  • Health(social science)
  • Health Professions(all)

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