A Concurrent Cognitive Task Does Not Perturb Quiet Standing in Fibromyalgia and Chronic Fatigue Syndrome

Table 1

Characteristics of the participants in each group.

Variables	HC ()	CFS ()	FM ()
Age (years)	34.4 (7.9)	34.0 (8.9)	38.6 (8.0)
Weight (kg)	68.0 (9.8)	71.6 (12.9)	75.4 (14.3)
Height (cm)	167.2 (7.1)	169.1 (5.4)	168.5 (6.0)
BMI (kg/m^2)	24.3 (3.5)	25.2 (5.1)	26.5 (4.5)
Education (years)	16.1 (2.3)	13.4 (2.5)	13.5 (2.2)
Pain level^a	0.08 (0.28)^,	1 (1.16)	3.7 (1.8)
Fatigue level^a	0.6 (0.8)	3 (1.8)	3.2 (2.2)
Chalder score	5.8 (5.7)^,	25.4 (3.8)	21.1 (5)
FIQ	—	—	56.9 (13)

Data are presented as means (SD). HC: healthy control; CFS: chronic fatigue syndrome; FM: fibromyalgia; FIQ: Fibromyalgia Impact Questionnaire. ^aLevel of pain and fatigue on the day of testing registered upon arrival to the lab. Significance level 0.05; significance level 0.01.