Journal of Clinical Epidemiology
Volume 56, Issue 11 , Pages 1076-1083 , November 2003

Rasch analysis of the western ontariomcmaster (WOMAC) osteoarthritis index: results from community and arthroplasty samples

  • A.M. Davis

      Affiliations

    • Departments of Physical Therapy, Graduate Department of Rehabilitation Science and Health Policy, Management and Evaluation (Program in Clinical Epidemiology and Health Services Research), Toronto Rehabilitation Institute and the University of Toronto, Room 1119, 550 University Avenue, Toronto, ON M5G 2A2, Canada
    • Corresponding Author InformationCorresponding author. Tel.: 416-597-3422, ext. 3478; fax: 416-597-3031.
    • ,
  • E.M. Badley

      Affiliations

    • Arthritis Community Research and Evaluation Unit, Graduate Department of Public Health Science, University Health Network, University of Toronto, Toronto Western Research Institute, 399 Bathurst Street, MP10-310, Toronto, ON M5T 2S8, Canada
    • ,
  • D.E. Beaton

      Affiliations

    • Institute for Work and Health, Mobility Program and Clinical Research, Departments of Occupational Therapy, Graduate Department of Health Policy, Management and Evaluation (Program in Clinical Epidemiology and Health Services Research), University of Toronto, St. Michael's Hospital, 30 Bond Street, Toronto, ON M5B 1W8, Canada
    • ,
  • J. Kopec

      Affiliations

    • Arthritis Research Centre of Canada and the Department of Health Care and Epidemiology, University of British Columbia, 895 West 10th Avenue, Vancouver, BC V5Z 1L7, Canada
    • ,
  • J.G. Wright

      Affiliations

    • Department of Surgery and Population Health Science, Hospital for Sick Children, Graduate Department of Health Policy, Management and Evaluation (Program in Clinical Epidemiology and Health Services Research), University of Toronto, 555 University Avenue, Toronto, ON M5G 1X8, Canada
    • ,
  • N.L. Young

      Affiliations

    • Community Health Systems Resource Group, Hospital for Sick Children, Departments of Pediatrics and Physical Therapy, Graduate Department of Rehabilitation Science and Health Policy (Program in Clinical Epidemiology and Health Services Research), University of Toronto, 555 University Avenue, Toronto, ON M5G 1X8, Canada
    • ,
  • J.I. Williams

      Affiliations

    • Toronto Rehabilitation Institute and the Institute for Clinical and Evaluative Sciences, Sunnybrook and Women's College Health Sciences Centre, Public Health Science, University of Toronto, 550 University Avenue, Toronto, ON M5G 2A2, Canada

,Accepted 1 June 2003.

References 

  1. Bellamy N, Buchanan WW, Goldsmith CH, Campbell J. Validation study of WOMAC: a health status instrument for measuring clinically important patient relevant outcomes following total hip or knee arthroplasty in osteoarthritis. J Orthop Rheumatol. 1988;1:95–108
  2. Bellamy N, Buchanan WW, Goldsmith CH, Campbell J, Stitt W. Validation study of WOMAC: a health status instrument for measuring clinically important patient relevant outcomes to antirheumatic drug therapy in patients with osteoarthritis of the hip or knee. J Rheumatol. 1988;15(12):1833–1840
  3. Bombardier C, Melfi CA, Paul J, Green R, Hawker G, Wright J, et al. Comparison of a generic and a disease-specific measure of pain and physical function after knee replacement surgery. Med Care. 1995;33(4 Suppl):AS131–AS144
  4. Hawker G, Melfi CA, Paul J, Green R, Bombardier C. Comparison of a generic (SF-36) and a disease specific (WOMAC) (Western Ontario and McMaster Universities Osteoarthritis Index) instrument in the measurement of outcomes after knee replacement surgery. J Rheumatol. 1995;22(6):1193–1196
  5. Bellamy N. WOMAC osteoarthritis index: a user's guide, IV. London; 2000.
  6. Meenan RF, Mason JH, Anderson JJ, Guccione AA, Kazis LE. AIMS2. The content and properties of a revised and expanded Arthritis Impact Measurement Scales Health Status Questionnaire. Arthritis Rheum. 1992;35(1):1–10
  7. Ramey DR, Raynauld JP, Fries JF. The health assessment questionnaire 1992: status and review. Arthritis Care Res. 1992;5(3):119–129
  8. Lingard EA, Katz JN, Wright RJ, Wright EA, Sledge CB. Validity and responsiveness of the Knee Society Clinical Rating System in comparison with the SF-36 and WOMAC. J Bone Joint Surg Am. 2001;12(83-A):1856–1864
  9. Rasch G. Probabilistic model for some intelligence and attainment tests, expanded edition. University of Chicago Press: Chicago; 1980; p. 199
  10. Andiel C. Rasch analysis: a description of the model and related issues. Can J Rehabil. 1995;9(1):17–25
  11. Wolfe F, Kong SX. Rasch analysis of the Western Ontario MacMaster questionnaire (WOMAC) in 2205 patients with osteoarthritis, rheumatoid arthritis, and fibromyalgia. Ann Rheum Dis. 1999;58(9):563–568
  12. Haley SM, McHorney CA, Ware JE. Evaluation of the MOS SF-36 physical functioning scale (PF-10): I. Unidimensionality and reproducibility of the Rasch item scale. J Clin Epidemiol. 1994;47(6):671–684
  13. Linacre JM, Heinemann AW, Wright BD, Granger CV, Hamilton BB. The structure and stability of the Functional Independence Measure. Arch Phys Med Rehabil. 1994;75(2):127–132
  14. Tesio L, Granger CV, Fiedler RC. A unidimensional pain/disability measure for low-back pain syndromes. Pain. 1997;69(3):269–278
  15. Ryser L, Wright BD, Aeschlimann A, Mariacher-Gehler S, Stucki G. A new look at the Western Ontario and McMaster Universities Osteoarthritis Index using Rasch analysis. Arthritis Care Res. 1999;12(5):331–335
  16. Hawker GA, Wright JG, Coyte PC, Williams JI, Harvey B, Glazier R, et al. Differences between men and women in the rate of use of hip and knee arthroplasty. N Engl J Med. 2000;342(14):1016–1022
  17. Hawker GA, Wright JG, Coyte PC, Williams JI, Harvey B, Glazier R, et al. Determining the need for hip and knee arthroplasty: the role of clinical severity and patients' preferences. Med Care. 2001;39(3):206–216
  18. Wright JG, Young NL. A comparison of different indices of responsiveness. J Clin Epidemiol. 1997;50(3):239–246
  19. Linacre JM, Wright BD. A user's guide to Bigsteps, Winsteps. Chicago: MESA Press; 1998; p. 109
  20. Wright BD, Linacre JM. Reasonable mean-square fit values. Rasch Measure Transact. 1994;8:370
  21. SPSS . SPSS. Chicago, IL: SPSS Inc; 2000;
  22. Andrich D. Rasch models of measurement. Newbury Park, CA: Sage Publications; 1988; p. 95

PII: S0895-4356(03)00179-3

doi: 10.1016/S0895-4356(03)00179-3

Journal of Clinical Epidemiology
Volume 56, Issue 11 , Pages 1076-1083 , November 2003

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