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Pretreatment data of 20 patients with chronic inflammatory joint disease subjected to intra-articular glucocorticoid injections. IQR = 25th–75th percentile; n is the number of patients.
| Background variables | Median | IQR | n | |
| Age | (years) | 50 | 18 | 20 |
| Duration of general joint involvement | (years) | 10 | 14 | 20 |
| Duration of local TMJ involvement | (years) | 5 | 11 | 19 |
| Number of involved joints | (1–9) | 6 | 3 | 20 |
| Thrombocyte particle concentration | (109/L) | 289 | 95 | 14 |
