Comparison among ACR1997, SLICC and the new EULAR/ACR classification criteria in childhood-onset systemic lupus erythematosus

Table 1 General characteristics of case and control groups

	Cases (N = 122)	Controls (N = 89)	P value
Sex ratio (female: male)	101:21	67:22	0.226
Median onset age, years	10.32	9.00	< 0.001
(range)	(2.8–17.1)	(1.1–15.8)
Interquartile range (years)	3.2	6.3
Median age at diagnosis, years	10.63	9.5	0.024
(range)	(4.1–17.3)	(1.9–17.8)
Interquartile range (years)	3.0	7.0
Median time to diagnosis, months	3.00	9.00	< 0.001
(range)	0–60	1–68
Interquartile range (years)	4.0	18.5
Median follow-up time, years	6.00	6.00	0.91
(range)	1–13	2–16
Interquartile range (years)	4.0	4.0

Cases were patients with a well-established clinical diagnosis of childhood-onset SLE (cSLE). Controls had systemic-onset juvenile idiopathic arthritis, JDM juvenile dermatomyositis, JSS juvenile systemic sclerosis, MCTD mixed connective tissue disease, SS Sjögren syndrome, APS primary antiphospholipid syndrome, or primary vasculitis (Behçet, polyarteritis nodosa, Takayasu’s arteritis and granulomatosis with polyangiitis)

ISSN: 2523-3106