Skip to main content

Table 6 Mean values for main psychophysiological measures (Psychophysiological measures)

From: Muscle activity and acute stress in fibromyalgia

  FM
(n = 51)
Control
(n = 31)
p-value
%EMG (%)
 Mean (SD) 2.2 (1.4) 1.0 (0.5) < 0.001
 Median [Min, Max] 1.8 [0.3, 7.3] 0.9 [0.3, 2.6]  
EMG Rest Time (%)
 Mean (SD) 26.7 (19.9) 47.2 (16.4) < 0.001
 Median [Min, Max] 25.6 [0.4, 79.5] 49.0 [13.1, 74.3]  
Pain (NRS 0–10)
 Mean (SD) 3.6 (2.2) 0.1 (0.5) < 0.001
 Median [Min, Max] 3.7 [0.0, 8.5] 0.0 [0.0, 2.5]  
Stress (NRS 0–10)
 Mean (SD) 3.5 (2.4) 1.4 (1.4) < 0.001
 Median [Min, Max] 3.3 [0.0, 9.3] 1.3 [0.0, 6.3]  
  1. FM Fibromyalgia patients, SD standard deviation, NRS Numerical rating scale, %EMG Normalized surface electromyography