Table 5.

Comparison between systemic, polyarticular, oligoarticular juvenile idiopathic arthritis subtypes regarding demographic, clinical, laboratory and magnetic resonance imaging findings

Variables	Systemic JIA Mean±SD	Polyarticular JIA Mean±SD	Oligoart. JIA Mean±SD	F-value	p-value	Sig.
Age (years)	12.16±4.07	14.78±1.83	14.33±1.52	1.7	>0.05	NS
Age at dis.ons (years)	8.00±4.09	10.03±2.25	7.00±3.60	1.9	>0.05	NS
Dis. duration (years)	4.16±0.76	4.75±2.43	7.33±2.51	1.7	>0.05	NS
No. of active jts	2.00±1.0	5.28±0.46	1.66±0.57	77.2	<0.001	HS
Dis. activity score	4.33±0.57	3.42±1.01	2.00±0.00	5.09	<0.05	S
C-HAQ	1.33±0.28	0.99±0.47	0.46±0.30	2.9	>0.05	NS
Pain score	1.83±0.73	1.50±0.51	0.70±0.17	3.9	<0.05	S
MIO (mm)	37.33±0.57	42.85±4.14	49.33±3.21	7.5	<0.05	S
ESR (mm h−1)	106.30±35.92	61.50±29.2	15.33±4.16	7.6	<0.05	S
CRP (mg mL−1)	35.00±2.0	22.28±10.06	6.66±0.57	7.7	<0.05	S
S.S100A12 (ng mL−1)	1070.00±480.3	691.07±295.61	145.00±8.66	6.9	<0.05	S
Syn. enhan. score	4.00±0.0	2.57±1.65	1.33±1.15	2.3	>0.05	NS
Effusion score	3.33±0.57	1.28±1.32	0.00±0.0	6.2	<0.05	S
Pannus score	2.66±1.52	0.28±0.72	0.00±0.0	11.2	<0.05	S
Erosion score	2.33±1.15	0.14±0.36	0.00±0.0	24.3	<0.001	HS
Total MRI score	12.33±2.08	4.28±2.99	1.33±1.15	13.8	<0.001	HS

Oligoart: Oligoarticular, JIA: Juvenile idiopathic arthritis, Dis: Disease, ons: Onset, No: Number, Jts: Joints,C-HAQ: Child health assessment questionnaire, MIO: Maximal interincisal opening, ESR: Erythrocyte sedimentation rate, CRP: C-reactive protein, S: Serum, Syn. enhan: Synovial enhancement, MRI: Magnetic resonance imaging. A significant increase in serum S100A12 levels and total magnetic resonance imaging score in systemic and polyarticular subtypes compared to oligoarticular patients with juvenile idiopathic arthritis. NS: Not significant, S: Significant, HS: Highly significant