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The measurement of psychological constructs in people with osteoarthritis of the knee: a psychometric evaluation

Lincoln, Nadina; Moreton, Bryan; Turner, K.; Walsh, David A.


Nadina Lincoln

Bryan Moreton

K. Turner

David A. Walsh


Purpose: To examine the measurement properties of measures of psychological constructs in people with knee osteoarthritis.
Method: Participants with osteoarthritis of the knee completed the beck depression inventory (BDI-II), state-trait anxiety inventory (STAI), arthritis helplessness index (AHI), fatigue severity scale (FSS), coping strategies questionnaire (CSQ), beliefs about pain control questionnaire (BPCQ), illness perceptions questionnaire-revised (IPQ-R), pain self-efficacy questionnaire (PSEQ) at home as part of a set of measures covering different aspects of osteoarthritis pain. The questionnaires were returned by pre-paid envelope. Rasch analysis was used to check the psychometric properties of the scales in people with osteoarthritis.
Results: The STAI-SF was an acceptable measure of anxiety and the revised FSS an acceptable measure of fatigue, with removal of items 1 and 2. The BDI subscales were acceptable for measuring negative thoughts and behaviours related to depressive symptomatology with some modifications to the scale. The helplessness scale of the AHI was acceptable as a measure of helplessness. The PSEQ was an acceptable measure of self-efficacy and the CSQ as a measure of cognitive coping strategies. The BPCQ and IPQ-R did not fit the Rasch model.
Conclusions: These findings indicate that questionnaires need to be checked for their ability to measure psychological constructs in the clinical groups to which they will be applied.

Journal Article Type Article
Acceptance Date Jan 21, 2016
Online Publication Date Mar 16, 2016
Publication Date Feb 28, 2017
Deposit Date May 21, 2018
Journal Disability and Rehabilitation
Print ISSN 0963-8288
Electronic ISSN 1464-5165
Publisher Taylor & Francis Open
Peer Reviewed Peer Reviewed
Volume 39
Issue 4
Keywords Coping, fatigue, knee, mood, osteoarthritis, Rasch
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