Table 1.

JIA patient demographics by subtype.

JIA subtype	Number (%)	Female (%)	Mean disease duration
Oligoarticular	66 (48.6)	49 (73%)	3.7
Oligoarticular extended	12 (8.7)	10 (83%)	3.2
Polyarticular rheumatoid factor negative	27 (19.6%)	20 (74%)	3.6
Systemic JIA	8 (5.8%)	5 (63%)	3.1
Psoriatic	5 (3.6%)	1 (20%)	3.3
Enthesitis-related arthritis	1 (0.72%)	0 (0%)	1.8
Undifferentiated	19 (13.8%)	12 (63%)	3.9
Total	138	97