Table 1. Demographic and clinical data of patients and controls groups.

Variable	FM patients (N = 38)	Healthy controls (N = 21)
Age (years)	M = 42,18 SD = 10,163	M = 32,62 SD = 13,912
G (M/F)	3/35	8/15
Disease duration (years)	M = 5,48 SD = 8,33	-
WPI (0–19)	M = 12,40 SD = 4,85	-

A, age in years; G, gender; WPI, Widespread Pain Index; M, mean; SD, standard deviation.