Radiographic grading for knee osteoarthritis. A revised scheme that relates to alignment and deformity

J Rheumatol. 1999 Mar;26(3):641-4.


Objective: To develop a radiographic grading scheme for osteoarthritis of the knee that would relate to arthritic progression and deformity.

Methods: The scheme of Scott, et al was revised to include new fields of Tibial Erosion and Subluxation; the fields of Tibial Osteophytes and Sclerosis were removed. The worst affected compartment only was scored on frontal Standardized Knee Images, which were used to define knee alignment variables.

Results: The interreader reliability (kappa = 0.92) and correlation for total scores (r = 0.94) were both excellent (p < 0.001). Individual field scores and total knee scores both correlated well with most limb alignment variables, especially the hip-knee-ankle angle (r = 0.77, p < 0.001).

Conclusion: These findings encourage further evaluations for outcome measurement, diagnostic sensitivity, and sensitivity to define arthritic change over time.

MeSH terms

  • Arthroscopy / methods*
  • Biomechanical Phenomena
  • Disease Progression
  • Female
  • Humans
  • Joint Dislocations / diagnostic imaging
  • Joint Dislocations / pathology
  • Knee Joint / diagnostic imaging
  • Knee Joint / pathology
  • Male
  • Middle Aged
  • Observer Variation
  • Osteoarthritis, Knee / classification
  • Osteoarthritis, Knee / diagnostic imaging*
  • Osteoarthritis, Knee / pathology
  • Radiography
  • Reproducibility of Results
  • Single-Blind Method
  • Tibia / diagnostic imaging
  • Tibia / pathology