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Assessment Tools for the Elderly - Assessment Summary Sheet Test: Western Ontario McMaster Osteo-Arthritis Index (WOMAC)
Year: 1982
Variations/Translations: Available in 65 languages. Alternate language forms: Asia-Pacific, North America, Central America, South America, Europe, Other (Egypt, Israel, Lebanon, Korea, Russia, South Africa). Since its development in 1982 the WOMAC Index has undergone several revisions and modifications. Three shortened versions now exist.
Setting: Clinical and interventional settings
Method
of Delivery: Patient
self-report questionnaire, accompanied by instruction shee Description:
The
WOMAC Index was developed to assess and quantify pain, joint
stiffness and disability related to osteoarthritis of the knee and
hip. It has also been used with arthroplasty (joint replacement
surgery) populations. The Index contains 24 questions, 5 related to
pain, 2 to stiffness and 17 to physical function. It can be used to
monitor the course of the disease or to determine the effectiveness
of a variety of interventions (pharmacologic, surgical, physiotherapy
etc.). It provides an excellent look at a patient’s functional
capacity and complements the more objective data provided by magnetic
resonance imaging, arthroscopy, cartilage biopsy, and radiographs. Scoring/Interpretation: The Index is available in 5-point Likert (LK), 100mm visual analog (VA), and 11-point numerical rating (NR) scaling formats. Individual question responses are assigned a score of between 0 (extreme) and 4 (None). Individual question scores are then summed to form a raw score ranging from 0 (worst) to 96 (best). Finally, raw scores are normalized by multiplying each score by 100/96. This produces a reported WOMAC Score of between 0 (worst) to 100 (best).
Time to Administer: 10-15 minutes to complete, 5-10 minutes to score Availability: This test is proprietary and available for purchase on a cost recovery basis. Software: WOMAC 3.1 User Guide available Websites: http://www.womac.org/womac/index.htm http://www.health.gov.on.ca/transformation/wait_times/providers/system/innovation/womac.pdf Quantitative/Qualitative: Quantitative Validity (Quantitative): Construct validity when tested against other scales ranged from 0.68 to 0.75. Reliability (Quantitative): Reliability estimates for pain, stiffness and physical function range from 0.73 to 0.96. References: Bellamy, N., & Buchanan, W.W. (1986). A preliminary evaluation of the dimensionality and clinical importance of pain and disability in osteoarthritis of the hip and knee. Clinical Rheumatology, 5, 231-41. Bellamy, N., Kean, W.F., Buchanan, W.W., Gerecz-Simon, E., & Campbell, J. (1992) Double-blind randomized controlled trial of sodium meclofenate (Meclomen) and diclofenac sodium (Voltaren): post validation reapplication of the WOMAC Osteoarthritis index. Journal of Rheumatology, 19: 153-9. Bellamy N., Buchanan, W.W., Goldsmith, C.H., Campbell, J., & Stitt, L.W. (1988). Validation study of WOMAC: a health status instrument for measuring clinically important patient relevant outcomes to anti-rheumatic drug therapy in patients with osteoarthritis of the hip or knee. Journal of Rheumatology, 15:1833–40. Bellamy, N. (2005). The WOMAC Knee and Hip Osteoarthritis Indices: Development, validation, globalization and influence on the development of the AUSCAN Hand Osteoarthritis Indices. Clinical and Experimental Rheumatology ; 23 (Suppl. 39); 148-153 McConnell, S., Kolopack, P., & Davis, A.M. (2001). The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC): a review of its utility and measurement properties. Arthritis Care Research, 45, 453-61. Comments: |