Back To Classification Criteria
Clinical and laboratory |
Clinical and radiographic |
Clinical † |
|---|---|---|
Knee pain |
Knee pain |
Knee pain |
+ at least 5 of 9: |
+ at least 1 of 3: |
+ at least 3 of 6: |
- Age > 50 years |
- Age > 50 years |
- Age > 50 years |
- Stiffness < 30 minutes |
- Stiffness < 30 minutes |
- Stiffness < 30 minutes |
- Crepitus |
- Crepitus |
- Crepitus |
- Bony Tenderness |
+ Osteophytes |
- Bony Tenderness |
- Bony enlargement |
|
- Bony enlargement |
- No palpable warmth |
|
- No palpable warmth |
- ESR <40 mm/hour |
|
|
- RF <1:40 |
|
|
- SF OA |
|
|
|
|
|
92% sensitive |
91% sensitive |
95% sensitive |
75% specific |
86% specific |
69% specific |
* ESR = erythrocyte sedimentation rate (Westergren); RF = rheumatoid factor; SF OA = synovial fluid signs of OA (clear, viscous, or white blood cell count <2,000/mm3).
† Alternative for the clinical category would be 4 of 6, which is 84% sensitive and 89% specific.
R. Altman, E. Asch, D. Bloch, G. Bole, D. Borenstein, K. Brandt, et al. The American College of Rheumatology criteria for the classification and reporting of osteoarthritis of the knee. Arthritis Rheum 1986;29:1039--1049.
