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Factors affecting treatment response
| Predictor factor | No. of studies showing positive effect | No. of studies showing no effect | No. of studies showing negative effect |
|---|---|---|---|
| Synovitis | 0 | 2a | 1 |
| Aspiration | 1 | 2 | 0 |
| Effusion | 2 | 4 | 0 |
| Severity of radiographic degeneration | 2 | 2 | 0 |
| Sonographic-guided injection | 1 | 0 | 0 |
| Worse pain | 1 | 1 | 0 |
| Worse stiffness | 1 | 1 | 0 |
| Worse knee function | 1 | 2 | 0 |
| Duration of symptom | 0 | 2 | 0 |
aOne study used clinical assessment of synovitis.
