Table 2.

Comparison of self-reported pain and stress between fibromyalgia syndrome patients and healthy controls

Phase	FMS (N = 90)		HC (N = 30)		p value
	Mean	SD	Mean	SD
Pain
Baseline	4.70	(2.30)	0.00	(0.00)	<0.001
Relax 1	4.75	(2.14)	0.00	(0.00)	<0.001
Arithmetic	5.60	(2.19)	0.07	(0.25)	<0.001
Relax 2	5.33	(1.70)	0.00	(0.00)	<0.001
Conflict	5.63	(2.03)	0.34	(0.71)	<0.001
Relax 3	5.40	(1.79)	0.23	(0.50)	<0.001
Stress
Baseline	2.65	(0.92)	1.17	(0.79)	<0.001
Relax 1	2.22	(0.85)	0.17	(0.38)	<0.001
Arithmetic	4.70	(2.01)	2.37	(0.72)	<0.001
Relax 2	3.10	(1.10)	0.10	(0.31)	<0.001
Conflict	5.60	(1.88)	3.33	(1.03)	<0.001
Relax 3	3.04	(0.98)	0.57	(0.68)	<0.001

FMS, fibromyalgia syndrome; HC, healthy controls; SD, standard deviation.