Measuring illness and exercise beliefs in osteoarthritis of the hip or knee

Psychometric properties of the 'Hip and Knee Beliefs Questionnaire' and the 'Exercise Attitude Questionnaire'

Nefyn H. Williams, Elvis Amoakwa, John Belcher, Kim Burton, Maggie Hendry, Ruth Lewis, Kerenza Hood, Paul Bennett, Richard D. Neal, Clare Wilkinson

Research output: Contribution to journalArticle

Abstract

Objectives: To adapt the Back Beliefs Questionnaire (BBQ) to measure illness beliefs in people with osteoarthritis of the hip or knee, and to measure the psychometric properties of this new 'Hip and Knee Beliefs Questionnaire' (HKBQ) together with the 'Exercise Attitude Questionnaire-18' (EAQ-18), which measures exercise-related treatment beliefs. Method: Cognitive debriefing through semi-structured interviews was used to assess the face validity of the HKBQ and the EAQ-18. Both questionnaires were tested on people with hip or knee osteoarthritis enrolled into a phase II randomized controlled trial examining the effectiveness of an evidence-based booklet in changing illness and treatment beliefs. Items in these outcome measures were accepted if they fulfilled a series of psychometric criteria including response frequency, item-total correlation, and factor analysis. The final questionnaires were tested for reliability, responsiveness, criterion, and construct validity. Results: No items were discarded from either of the final questionnaires, although one item in the EAQ-18 was borderline. Both questionnaires showed evidence of internal consistency, test-retest reliability, face validity, and criterion validity; there was less evidence for construct validity. The responsiveness of the HKBQ showed a medium-sized change; the EAQ-18 a small change. Conclusion: Both these outcome measures can be used in future trials and other studies which measure change in illness and exercise beliefs in people with osteoarthritis of the hip or the knee. Further testing of validity and responsiveness using interventions with larger effect sizes should be performed. Trial registration: Current Controlled Trials ISRCTN24554946.

Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalInternational Musculoskeletal Medicine
Volume34
Issue number1
DOIs
Publication statusPublished - 1 Apr 2012

Fingerprint

Hip Osteoarthritis
Knee Osteoarthritis
Psychometrics
Hip
Knee
Reproducibility of Results
Surveys and Questionnaires
Outcome Assessment (Health Care)
Pamphlets
Statistical Factor Analysis
Randomized Controlled Trials

Cite this

Williams, Nefyn H. ; Amoakwa, Elvis ; Belcher, John ; Burton, Kim ; Hendry, Maggie ; Lewis, Ruth ; Hood, Kerenza ; Bennett, Paul ; Neal, Richard D. ; Wilkinson, Clare. / Measuring illness and exercise beliefs in osteoarthritis of the hip or knee : Psychometric properties of the 'Hip and Knee Beliefs Questionnaire' and the 'Exercise Attitude Questionnaire'. In: International Musculoskeletal Medicine. 2012 ; Vol. 34, No. 1. pp. 13-20.
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abstract = "Objectives: To adapt the Back Beliefs Questionnaire (BBQ) to measure illness beliefs in people with osteoarthritis of the hip or knee, and to measure the psychometric properties of this new 'Hip and Knee Beliefs Questionnaire' (HKBQ) together with the 'Exercise Attitude Questionnaire-18' (EAQ-18), which measures exercise-related treatment beliefs. Method: Cognitive debriefing through semi-structured interviews was used to assess the face validity of the HKBQ and the EAQ-18. Both questionnaires were tested on people with hip or knee osteoarthritis enrolled into a phase II randomized controlled trial examining the effectiveness of an evidence-based booklet in changing illness and treatment beliefs. Items in these outcome measures were accepted if they fulfilled a series of psychometric criteria including response frequency, item-total correlation, and factor analysis. The final questionnaires were tested for reliability, responsiveness, criterion, and construct validity. Results: No items were discarded from either of the final questionnaires, although one item in the EAQ-18 was borderline. Both questionnaires showed evidence of internal consistency, test-retest reliability, face validity, and criterion validity; there was less evidence for construct validity. The responsiveness of the HKBQ showed a medium-sized change; the EAQ-18 a small change. Conclusion: Both these outcome measures can be used in future trials and other studies which measure change in illness and exercise beliefs in people with osteoarthritis of the hip or the knee. Further testing of validity and responsiveness using interventions with larger effect sizes should be performed. Trial registration: Current Controlled Trials ISRCTN24554946.",
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Measuring illness and exercise beliefs in osteoarthritis of the hip or knee : Psychometric properties of the 'Hip and Knee Beliefs Questionnaire' and the 'Exercise Attitude Questionnaire'. / Williams, Nefyn H.; Amoakwa, Elvis; Belcher, John; Burton, Kim; Hendry, Maggie; Lewis, Ruth; Hood, Kerenza; Bennett, Paul; Neal, Richard D.; Wilkinson, Clare.

In: International Musculoskeletal Medicine, Vol. 34, No. 1, 01.04.2012, p. 13-20.

Research output: Contribution to journalArticle

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T2 - Psychometric properties of the 'Hip and Knee Beliefs Questionnaire' and the 'Exercise Attitude Questionnaire'

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AU - Amoakwa, Elvis

AU - Belcher, John

AU - Burton, Kim

AU - Hendry, Maggie

AU - Lewis, Ruth

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AU - Bennett, Paul

AU - Neal, Richard D.

AU - Wilkinson, Clare

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N2 - Objectives: To adapt the Back Beliefs Questionnaire (BBQ) to measure illness beliefs in people with osteoarthritis of the hip or knee, and to measure the psychometric properties of this new 'Hip and Knee Beliefs Questionnaire' (HKBQ) together with the 'Exercise Attitude Questionnaire-18' (EAQ-18), which measures exercise-related treatment beliefs. Method: Cognitive debriefing through semi-structured interviews was used to assess the face validity of the HKBQ and the EAQ-18. Both questionnaires were tested on people with hip or knee osteoarthritis enrolled into a phase II randomized controlled trial examining the effectiveness of an evidence-based booklet in changing illness and treatment beliefs. Items in these outcome measures were accepted if they fulfilled a series of psychometric criteria including response frequency, item-total correlation, and factor analysis. The final questionnaires were tested for reliability, responsiveness, criterion, and construct validity. Results: No items were discarded from either of the final questionnaires, although one item in the EAQ-18 was borderline. Both questionnaires showed evidence of internal consistency, test-retest reliability, face validity, and criterion validity; there was less evidence for construct validity. The responsiveness of the HKBQ showed a medium-sized change; the EAQ-18 a small change. Conclusion: Both these outcome measures can be used in future trials and other studies which measure change in illness and exercise beliefs in people with osteoarthritis of the hip or the knee. Further testing of validity and responsiveness using interventions with larger effect sizes should be performed. Trial registration: Current Controlled Trials ISRCTN24554946.

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