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Is the Health Utilities Index valid in total hip arthroplasty patients?
Chris Blanchard1, David Feeny, Jeffrey L Mahon
1American Cancer Society, Atlanta, Georgia, USA.
Purpose:
The purpose of the study was to examine the construct validity of the Health Utilities Index Mark 2 (HU12) and Mark 3 (HU13) in patients with osteoarthritis (OA) needing total hip arthroplasty (THA).
Background:
One hundred and fourteen OA patients (mean age = 69.2; SD = 8.9) who were waiting to see a surgeon for an evaluation for THA completed baseline measures that included the HU12, HU13, SF-36, Harris Hip Scale, WOMAC, MACTAR, State-Trait Anxiety Inventory, and the 6-min walk test.
Methods:
We examined 87 a priori hypotheses by correlating (one-tailed zero-order correlations) the single-attribute utility scores for the pain, emotion, mobility, ambulation, self-care, dexterity, vision, hearing, and speech attributes of the HU12 and HU13 and the overall HU12 and HU13 utility scores to specified subscales of the other measures.
Results:
The zero-order correlations confirmed 75% of our a priori hypotheses suggesting that the constructs within the HU12 and HU13 were, in general, related to similar constructs in other measures as expected.
Conclusions:
The evidence suggests that HU12 and HU13 are valid for use in OA and THA studies.