From: Proceedings of the 24th Paediatric Rheumatology European Society Congress: Part one
 | All N = 342 | Oligoarthritis N = 91 | Polyarthritis N = 120 | Systemic N = 28 | Enthesitis related – Psoriatic N = 83 | Un classified N = 20 | p-value |
---|---|---|---|---|---|---|---|
Age at onset (median) | 7 | 8 | 10 | 6 | 10 | 9 | <.0001 |
Duration of disease (median) | 4 | 3 | 7 | 6,5 | 3 | 33 | <.0001 |
Gender Male:Female | 4:6 | 4:6 | 2:8 | 4:6 | 7:3 | 4:6 | <.0001 |
 | N % | N % | N % | N % | N % | N % | p-value |
RF (+) | 92/252 36,5 | 17/63 26,9 | 62/112 55,3 | 3/15 20 | 5/50 10 | 5/12 41,6 | <.0001 |
HLA-B27 | 26/126 20,6 | 7/34 20,5 | 3/23 13,1 | 0/4 0 | 15/61 24,6 | 1/4 25 | 0,648 |
Bone erosions | 33/147 22,4 | 4/38 10,5 | 17/66 25,7 | 4/7 57 | 2/27 7,4 | 6/9 66,6 | 0.0002 |
Axial involvement | 60 17,5 | 10 10,9 | 14 11,6 | 4 14,2 | 30 36,4 | 2 10 | <.0001 |
Peripheral involvement | 285 83,3 | 80 87,9 | 103 85,8 | 22 78,5 | 72 86,7 | 8 40 | <.0001 |