Table 1: Demographic and clinical data of patients with juvenile fibromyalgia, juvenile idiopathic arthritis and of healthy controls. Patients and controls’ pain scores according to the perspective of the patients and the parents.

	Fibromyalgia (n=50)	Juvenile idiopathic arthritis (n=50)	Health controls (n=50)	p-value
Gender (feminine/masculine)	43/7	41/9	42/8	0.86
Age at the onset of pain (years)*	8.7±3.7	5.4±3.3	-	<0.0001
Length of pain (years)*	4.6 ± 1.9	6.9± 2.3	-	<0.0001
Age of the patient at the time of the interview (years)*Θ	13.5±2.7	12.4±3.5	12.8±2.3	0.13
Pain score at the time of the interview from the patients and controls’ perspective (0 to 10)*	5.9±2.6	2.1±2.4	0.1±0.3	<0.0001
Pain score of the previous week from the patients and controls’ perspective (0 to 10)*	7.8±1.8	3.2±2.6	0.2±0.5	<0.0001
Pain score at the time of the interview from the parents’ perspective (0 to 10)*	5.9±2.9	3.0±2.8	0	<0.0001

*Mean± standard deviation; ΘANOVA with Brown-Forsythe correction (F₂,₁₃₂=2.04; p-value=0.1337), Kolmogorov-Smirnov test (p-value=0.4272).