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Correlations between joint space width and biochemical markers
| Biochemical marker | r | P |
| CRP | -0.212 | 0.751 |
| Pyridinoline | -0.282 | 0.039 |
| YKL-40 | -0.146 | 0.725 |
| MMP-3 | -0.241 | 0.466 |
| MMP-9 | -0.088 | 0.971 |
| TIMP-1 | -0.189 | 0.368 |
CRP, C-reactive protein; MMP, matrix metalloproteinase; TIMP, tissue inhibitor of metalloproteinases.
