| Number of samples analysed patients/controls | 10:15 |
| Age at enrollment [median (range) years] | 13.4 (0 - 26) |
| Age at onset [median (range) years] | 4.3 (0 - 12) |
| Disease duration [median (range) years] | 4.7 (1 - 11) |
| Disease activity (Steinbrocker) | |
| I [n] | 2 |
| II [n] | 7 |
| III [n] | 1 |
| ESR (mm/h) | 13 (3 - 58) |
| CRP (mg/l) | 3 (1 - 68) |
| Male/female | 4:6 |
| ANA positive | 5 |
| RF positive | 2 |
| HLA B27 positive | 1 |
| Patients on | |
| DMARDS (MTX) | 2 |
| NSAIDS | 8 |
| No therapy | 2 |
| Steroids | 0 |
| Biologicals | 0 |