Table 3

Differences in physiological variables between fibromyalgia syndrome patients and healthy controls

Phase
FMS (N = 90)
HC (N = 30)
p value


Mean
SD
Mean
SD


EMG





     Baseline
8.97
(4.75)
14.52
(5.12)
<0.001
     Relax 1
8.77
(4.83)
15.83
(5.23)
<0.001
     Mental arithmetic
10.44
(5.89)
17.10
(9.07)
<0.001
     Relax 2
8.91
(4.91)
17.60
(9.44)
<0.001
     Social conflict
9.59
(5.59)
17.04
(8.92)
<0.001
     Relax 3
9.63
(6.33)
18.50
(10.51)
<0.001
SCL





     Baseline
1.81
(1.70)
1.65
(0.64)
ns
     Relax 1
1.89
(1.78)
1.59
(0.62)
ns
     Mental arithmetic
2.81
(2.65)
1.92
(0.74)
<0.005
     Relax 2
2.31
(2.01)
1.76
(0.69)
ns
     Social conflict
2.76
(2.11)
1.79
(0.72)
<0.005
     Relax 3
2.41
(2.15)
1.69
(0.71)
ns
HR





     Baseline
77.07
(11.22)
68.56
(22.49)
ns
     Relax 1
75.45
(10.54)
65.68
(21.11)
<0.005
     Mental arithmetic
78.32
(13.64)
75.85
(24.72)
ns
     Relax 2
73.36
(10.86)
66.47
(19.55)
ns
     Social conflict
77.88
(10.64)
66.85
(20.88)
ns
     Relax 3
73.96
(9.59)
62.79
(18.11)
<0.005
SBP





     Baseline
133.5
(19.03)
132.9
(13.40)
ns
     Relax 1
131.4
(16.65)
130.4
(11.58)
ns
     Mental arithmetic
141.7
(19.52)
140.8
(14.35)
ns
     Relax 2
128.1
(13.20)
124.9
(21.00)
ns
     Social conflict
146.5
(15.09)
139.7
(18.29)
ns
     Relax 3
135.6
(14.31)
131.9
(23.38)
ns
DBP





     Baseline
78.43
(13.89)
77.10
(8.83)
ns
     Relax 1
76.23
(8.27)
76.24
(7.79)
ns
     Mental arithmetic
81.11
(10.80)
82.51
(10.83)
ns
     Relax 2
76.82
(14.54)
73.37
(7.61)
ns
     Social conflict
85.81
(9.33)
83.74
(10.29)
ns
     Relax 3
77.57
(7.75)
78.04
(9.60)
ns

DBP, diastolic blood pressure; EMG, electromyographic activity; FMS, fibromyalgia syndrome; HC, healthy controls; HR, heart rate; ns, not significant; SBP, systolic blood pressure; SCL, skin conductance level.

Thieme and Turk Arthritis Research & Therapy 2006 8:R9   doi:10.1186/ar1863