Table 1 The OA Grading Table
Scores | Osteoarthritis damage |
|---|---|
0 | Normal |
0.5 | Loss of Safranin O without structural changes |
1 | Small fibrillations without loss of cartilage |
2 | Vertical clefts down to the layer immediately below the superficial layer and some loss of surface lamina |
3 | Vertical clefts/erosion to the calcified cartilage extending to <25% of the articular surface |
4 | Vertical clefts/erosion to the calcified cartilage extending to 25–50% of the articular surface |
5 | Vertical clefts/erosion to the calcified cartilage extending to 50–75% of the articular surface |
6 | Vertical clefts/erosion to the calcified cartilage extending >75% of the articular surface |