A comparison of the discriminative and evaluative properties of the SF-36 and the SF-6D index View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2011-11

AUTHORS

Alex Mutebi, John E. Brazier, Stephen J. Walters

ABSTRACT

PURPOSE: To examine whether the move from the multidimensional SF-36 patient-reported outcome measure to the single-index preference-based SF-6D entails a loss in discriminative and evaluative properties, the magnitude of that loss and whether it matters. METHODS: Retrospective analysis of data from studies that used the SF-36 and the derived SF-6D. The discriminative and evaluative properties of the two measures were compared by calculating effect size (ES), standardized response mean (SRM), and relative validity (RV) statistics using the SF-6D as the reference. RESULTS: Data were available from seven studies and 8,522 subjects. At least one SF-36 scale was always more sensitive than the index. Cross-sectional pooled results showed that physical functioning (RV = 0.19 and ES = 0.13) and PCS (RV = 0.18 and ES = 0.13) were generally most sensitive compared to the index (RV = 0.16 and ES = 0.12). Longitudinal pooled results showed that PCS (RV = 0.20), MCS (RV = 0.17), general health (RV = 0.18), and social functioning (RV = 0.17) were generally more sensitive than the index (RV = 0.14) based on RVs. Longitudinal pooled SRMs were all very small in magnitude. CONCLUSION: No scale/dimension consistently had the largest RV, ES, or SRM across all conditions studied. Moving from the SF-36 to SF-6D entails losses of a small magnitude in discriminative and evaluative properties. More... »

PAGES

1477-1486

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11136-011-9881-z

DOI

http://dx.doi.org/10.1007/s11136-011-9881-z

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1038641357

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/21394558


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