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An analysis of the complementarity of ICECAP-A and EQ-5D-3 L in an adult population of patients with knee pain

Jowett, S; Nicholls, E; Al-Janabi, H; Keeley, T; Coast, J; Foster, NE

An analysis of the complementarity of ICECAP-A and EQ-5D-3 L in an adult population of patients with knee pain Thumbnail


Authors

S Jowett

H Al-Janabi

T Keeley

J Coast

NE Foster



Abstract

BACKGROUND: The ICECAP measures potentially offer a broader assessment of quality of life and well-being, in comparison to measures routinely used in economic evaluation, such as the EQ-5D-3 L. This broader assessment may allow measurement of the full effects of an intervention or treatment. Previous research has indicated that the ICECAP-O (for older people) and EQ-5D-3 L measure provide complementary information. This paper aims to determine similar information for the ICECAP-A (for the entire adult population) in terms of whether the measure is a substitute or complement to the EQ-5D-3 L. METHODS: Data from the BEEP trial - a multi-centre, pragmatic, randomised controlled trial - were used. Spearman rank correlations and exploratory factor analytic methods were used to assess whether ICECAP-A and EQ-5D-3 L are measuring the same, or different, constructs. RESULTS: A correlation of 0.49 (p?<?0.01) was found between the ICECAP-A tariff score and the EQ-5D-3 L index. Using the pooled items of the EQ-5D-3 L and the ICECAP-A a two factor solution was optimal, with the majority of EQ-5D-3 L items loading onto one factor and the majority of ICECAP-A items onto another. CONCLUSION: The results presented in this paper indicate that ICECAP-A and EQ-5D-3 L are measuring two different constructs and provide largely different, complementary information. Results showed a similarity to results presented by Davis et al. using the ICECAP-O. TRIAL REGISTRATION: ISRCTN 93634563.

Citation

Jowett, S., Nicholls, E., Al-Janabi, H., Keeley, T., Coast, J., & Foster, N. (2016). An analysis of the complementarity of ICECAP-A and EQ-5D-3 L in an adult population of patients with knee pain. Health and Quality of Life Outcomes, 36 -?. https://doi.org/10.1186/s12955-016-0430-x

Acceptance Date Feb 12, 2016
Publication Date Mar 3, 2016
Journal Health and Quality of Life Outcomes
Publisher Springer Verlag
Pages 36 -?
DOI https://doi.org/10.1186/s12955-016-0430-x
Publisher URL http://dx.doi.org/10.1186/s12955-016-0430-x

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