Comparative responsiveness of measures of pain and function after total hip replacement

Arthritis Rheum. 2001 Jun;45(3):258-62. doi: 10.1002/1529-0131(200106)45:3<258::AID-ART258>3.0.CO;2-L.


Objective: To compare the responsiveness of the Functional Assessment System (FAS), the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and the Medical Outcomes Study 36-item Short Form (SF-36) in patients with osteoarthritis (OA) scheduled for total hip replacement.

Method: Twenty patients with a mean age at surgery of 72.6 years, with primary OA of the hip, were investigated preoperatively and at 3, 6, and 12 months postoperatively with the FAS, WOMAC, and SF-36. The responsiveness was calculated as standardized response mean, effect size, and relative efficiency.

Results: The pain and function scores of WOMAC and SF-36 showed greater responsiveness than FAS at 3 months. These differences remained at 6 and 12 months postoperatively. The differences between these 3 outcome measures were found to be similar using several methods for calculating responsiveness.

Conclusion: Self-administered questionnaires like WOMAC and SF-36 are more responsive measures of pain and function than range of motion, performance tests, and observer-administered questions (FAS) following total hip replacement.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Arthroplasty, Replacement, Hip*
  • Female
  • Hip / physiopathology
  • Humans
  • Male
  • Middle Aged
  • Pain
  • Postoperative Complications