Journal Article

A brief screening tool for knee pain in primary care. 1. Validity and reliability

C. Jinks, M. Lewis, B. N. Ong and P. Croft

in Rheumatology

Volume 40, issue 5, pages 528-536
Published in print May 2001 | ISSN: 1462-0324
Published online May 2001 | e-ISSN: 1462-0332 | DOI:
A brief screening tool for knee pain in primary care. 1. Validity and reliability

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Objectives. To design and test the performance of a new knee pain screening tool (KNEST), both separately and together with a combination of existing questionnaires, which will be used to assess the general health status of knee pain sufferers in primary care.

Methods. A postal survey of knee pain and disability was sent to a random sample of 240 individuals aged over 55 yr registered with two general practices in North Staffordshire. The survey questionnaire consisted of the KNEST; a pain manikin; the Short Form 36 (SF‐36); the Hospital Anxiety and Depression Scale (HADS); demographic questions; and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) for those who reported knee pain. A second, identical questionnaire was sent 2 weeks later to a random subsample of responders (n=80) to test repeatability.

Results. An 85% baseline response rate was achieved for the first questionnaire. The 12‐month prevalence of knee pain identified from baseline responders to the survey was 45%. A response rate of 74% was achieved for the repeatability questionnaire. Each section of the questionnaire was well completed and repeatability was good for nearly all measures (most reliability scores exceeded 0.6). A new core question about knee pain showed good internal reliability, with an agreement score of 91% between baseline and retest assessment, and good construct validity in relation to knee pain identified on the pain manikin (agreement 95%). Good agreement was found between recalled consultation for knee pain in the questionnaire and evidence of consultation for knee pain in general practice records.

Conclusions. The KNEST appears to be a reliable and valid composite tool for the study of population needs and outcomes of care for people aged over 55 yr with knee pain.

Keywords: Knee Pain Screening Tool (KNEST); SF‐36; WOMAC; HADS; Knee pain; Knee osteoarthritis; Primary care; Needs assessment; GP record review; Epidemiology.

Journal Article.  5360 words.  Illustrated.

Subjects: Rheumatology

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