Table 1.

Demographic, clinical, and laboratory parameters of children with JIA

Characteristics of children with JIA (n = 34)
Female/male, n (%)	22/12 (64.7/35.3)
Age (years)/range	13.8 ± 1.2/7–18
Type of JIA onset
Polyarticular, n (%)	26 (76.5)
IgM-RF-negative	24
IgM-RF-positive	2
Oligoarticular, n (%)	8 (23.5)
Persistent oligoarticular JIA	7
Extended oligoarticular JIA	1
Disease duration time (years)	3.5 ± 0.8
ESR (mm/h)	19.4 ± 20.5 (median 10)
ESR above cutoff value (>20 mm/h), n (%)	8 (23.5)
CRP (mg/dL)	2.67 ± 6.26 (median 0.39)
CRP above cutoff value (>0.5 mg/dL), n (%)	14 (41.2)
IgM-RF positivity (≥24 RU/mL), n (%)	2 (5.9)
Disease activity
JADAS-27	23.94 ± 10.10 (median 25)

Data are means ± standard deviation (SD), unless otherwise indicated

n number of children, ERS erythrocyte sedimentation ratio, CRP C-reactive protein