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01.12.2012 | Short report | Ausgabe 1/2012 Open Access

Health and Quality of Life Outcomes 1/2012

Measurement equivalence of the SF-36 in the canadian multicentre osteoporosis study

Zeitschrift:
Health and Quality of Life Outcomes > Ausgabe 1/2012
Autoren:
Lisa M Lix, Beliz Acan Osman, Jonathan D Adachi, Tanveer Towheed, Wilma Hopman, K Shawn Davison, William D Leslie
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​1477-7525-10-29) contains supplementary material, which is available to authorized users.
Beliz Acan Osman, Jonathan D Adachi, Tanveer Towheed, Wilma Hopman, K Shawn Davison and William D Leslie contributed equally to this work.

Competing interests

The authors declare that they have no competing interests

Authors' contributions

LML planned the study and analyses and drafted the manuscript. BAO conducted the analyses and drafted the manuscript. JA, TT, SD, WH, and WDL participated in planning the study and facilitating data access. All authors read and approved the final manuscript.

Abstract

Background

Studies that compare health-related quality of life (HRQOL) and other patient-reported outcomes in different populations rest on the assumption that the measure has equivalent psychometric properties across groups. This study examined the measurement equivalence (ME) of the 36-item Medical Outcomes Study Short Form Survey (SF-36), a widely-used measure of HRQOL, by sex and race in a population-based Canadian sample.

Findings

SF-36 data were from the Canadian Multicentre Osteoporosis Study, a prospective cohort study that randomly sampled adult men and women from nine sites across Canada. Confirmatory factor analysis (CFA) techniques were used to test hypotheses about four forms of ME, which are based on equality of the factor loadings, variances, covariances, and intercepts. Analyses were conducted for Caucasian and non-Caucasian females (n = 6,539) and males (n = 2,884). CFA results revealed that a measurement model with physical and mental health factors provided a good fit to the data. All forms of ME were satisfied for the study groups.

Conclusions

The results suggest that sex and race do not influence the conceptualization of a general measure of HRQOL in the Canadian population.
Zusatzmaterial
Authors’ original file for figure 1
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Literatur
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