Table 1.

Clinical and laboratory characteristics of the juvenile idiopathic arthritis (JIA) group

Clinical parameters		N (%)
total number of JIA patients		50 (100)
sex	girls	40 (80)
	boys	10 (20)
JIA onset	oligoarthritis	31 (62)
	polyarticular	16 (32)
	systemic	3 (6)
JIA activity	low	28 (56)
	medium	9 (18)
	high	13 (26)
laboratory parameters		Mean values ± SD or N (%) of positivity
white blood cell (WBC) count		11.2 G/l
platelets (PLT) count		385 G/l
C-reactive protein (CRP)		8.5 mg/l
rheumatoid factor (RF) – positive		7 (14)
anti-nuclear antibodies (ANA) – positive		16 (32)
anti-CCP antibodies – positive		4 (8)