Knee pain and radiographic osteoarthritis interact in the prediction of levels of self-reported disability

David A. Williams, Michael J. Farrell, Jill Cunningham, Richard H. Gracely, Kirsten Ambrose, Thomas Cupps, Niveditha Mohan, Daniel J. Clauw

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33 Citations (Scopus)


Objective. To determine predictors of disability depending on whether joint deformity and pain reporting exist independently or concurrently. Methods. Subjects were 154 volunteers for an osteoarthritis screening examination. Eligible subjects completed questionnaires for physical function, pain, and depressive symptoms; underwent evoked pain testing for tenderness assessment; and had anteroposterior and lateral radiographs taken of both knees. Two blinded rheumatologists scored the images using Kellgren-Lawrence criteria to determine presence of deformity. Results. Subjects were divided into 3 subgroups based on radiographic evidence of deformity and self-reported pain. Disability was greatest when pain and deformity occurred together (F[2,1511 = 18.8, P < 0.0001). Self-reported disability in the absence of deformity was predicted by body mass index, pain threshold, and anxiety symptoms; disability was predicted by the number of osteophytes and depressive symptoms when pain and deformity occurred together. Conclusion. Self-reported disability in osteoarthritis of the knee is greatest with concurrent pain and joint deformity. When pain and deformity do not cooccur, disability appears to be related to separate factors, including anxiety and pain threshold (e.g., tenderness).

Original languageEnglish
Pages (from-to)558-561
Number of pages4
JournalArthritis Care & Research
Issue number4
Publication statusPublished - 15 Aug 2004
Externally publishedYes


  • Disability
  • Osteoarthritis
  • Pain

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