| Parameter | Value | Frequency/mean | Percentage/SD |
| Gender | Male | 11 | 28.9 |
| Female | 27 | 71.1 | |
| Age | Mean, SD (years) | 11.91 | 4.54 |
| Age at diagnosis | Mean, SD (years) | 7.32 | 4.53 |
| Disease duration | Mean, SD (years) | 3.26 | 2.52 |
| Diagnosis | Systemic | 9 | 23.7 |
| Polyarticular RF+ | 5 | 13.2 | |
| Polyarticular RF− | 12 | 31.6 | |
| Oligoarticular | 9 | 23.7 | |
| Extend oligoarticular | 1 | 2.6 | |
| Psoriatic arthritis | 2 | 5.3 | |
| Uveitis | Yes | 11 | 28.9 |
| No | 27 | 71.1 | |
| ANA-titer | Positive | 22 | 57.9 |
| Negative | 16 | 42.1 | |
| Rheumatoid factor | Positive | 8 | 21.1 |
| Negative | 28 | 73.7 | |
| Not available | 2 | 5.3 | |
| Anti-CCP | Positive | 4 | 10.5 |
| Negative | 18 | 47.4 | |
| Not available | 16 | 42.1 | |
| Past treatments | Methotrexate | 31 | 81.6 |
| Steroids | 19 | 50.0 | |
| NSAIDS | 7 | 18.4 | |
| Biological therapy | 1 | 2.6 | |
| IAI | 3 | 7.9 |