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Distribution of tibial cartilage erosion in end‐stage knee osteoarthritis with different numbers of compartments involved (knees)
| Modified Keyes classification | Number of compartments involved | ||
|---|---|---|---|
| Single | Double | Triple | |
| 1 | 78 | 20 | 11 |
| 2, 3 | 21 | 21 | 17 |
Comparison of the modified Keyes classifications with different numbers of compartments involved was carried out by χ2‐test (χ 2 = 21.1, P < 0.001).
