Abstract
This note reports on a 2000 study of the content validity of the EQ-5D's representation of health for 66 Māori (New Zealand's indigenous people, comprising 14.5% of the population) accessed through cultural networks. Also examined was the construct validity of the health state valuation instrument and its test–retest reliability based on repeated valuations for the two extreme health states. The possibility that the EQ-5D fails to capture what Māori regard as ‘health’ derives from the so-called ‘Māori health model’ that augments biological health with mental, spiritual and family well-being. Seventy six percent of respondents considered the EQ-5D's representation of health to be adequate. This proportion is not statistically significantly different from the rates for non-Māori and Māori respectively in an earlier study and might suggest the EQ-5D has content validity for Māori. However, the high prevalence of missing valuations, particularly for dead, and logical inconsistencies suggests that the health state valuation instrument lacks construct validity, although there is evidence of test–retest reliability.
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Perkins, M., Devlin, N. & Hansen, P. The validity and reliability of EQ-5D health state valuations in a survey of Māori. Qual Life Res 13, 271–274 (2004). https://doi.org/10.1023/B:QURE.0000015300.28109.38
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DOI: https://doi.org/10.1023/B:QURE.0000015300.28109.38