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ISSN: 2167-7921

Journal of Arthritis
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Research Article

Validation of the Injustice Experiences Questionnaire Adapted for Use with Patients with Severe Osteoarthritis of the Knee

Esther Yakobov1, Whitney Scott2, Michael Tanzer1, William Stanish3, Michael Dunbar3, Glen Richardson3, Michael JL Sullivan1*
1Department of Psychology, McGill University, Montreal, Canada
2Department of Psychology, Institute of Psychiatry, King's College London, London, United Kingdom
3Department of Surgery, Dalhousie University, Halifax, Canada
Corresponding Author : Dr. Michael Sullivan
Department of Psychology
McGill University1205 Doctor Penfield Avenue
Montreal, QC H3A 1B1, Canada
Tel: 514-398-5677
E-mail: [email protected]
Received April 22, 2014; Accepted May 27, 2014; Published May 30, 2014
Citation: Yakobov E, Scott W, Tanzer M, Stanish W, Dunbar M, et al. (2014) Validation of the Injustice Experiences Questionnaire adapted for Use with Patients with Severe Osteoarthritis of the Knee. J Arthritis 3:130. doi:10.4172/2167-7921.1000130
Copyright: © 2014 Yakobov E, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Objective: Recent research has linked perceptions of injustice to problematic recovery outcomes for individuals with musculoskeletal injuries. However, the measure currently used to assess perceived injustice is not readily applicable to individuals who have a pain condition, such as osteoarthritis (OA), where pain onset is insidious as opposed to traumatic. The purpose of this study was to validate a modified version of the Injustice Experiences Questionnaire (IEQ-chr) for patients with OA of the knee.

Methods: The IEQ-chr was administered along with measures of pain catastrophizing, fear of movement, depressive symptoms, pain severity and physical function to 110 individuals with severe OA of the knee.

Results: Principal component analyses yielded a factor structure similar to that in the original validation study. The IEQ-chr had high internal consistency (Chronbach alpha=0.88), and was significantly correlated with pain catastrophizing, fear of movement, depressive symptoms, pain severity and physical function. Regression analyses revealed that the IEQ-chr contributed significant unique variance to prediction of pain severity and physical function, beyond the variance accounted for by measures of pain catastrophizing and fear of movement.

Conclusions: The findings of the present study support the construct validity of the IEQ-chr in the context of osteoarthritis, and suggest that this measure may be useful in psychosocial assessment of individuals at risk for adverse pain outcomes. The discussion addresses theoretical and clinical implications of these findings.

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