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Table 2 Preliminary questionnaire data (Psychological questionnaires)

From: Muscle activity and acute stress in fibromyalgia

  FM
(n = 51)
Control
(n = 31)
p-value
ACR2016 symptom severity scale
 Mean (SD) 8.12 (2.44) 2.35 (1.56) < 0.001
 Median [Min, Max] 8.00 [4.00, 12.0] 3.00 [0, 6.00]  
ACR2016 widespread pain index
 Mean (SD) 11.3 (4.19) 1.48 (1.77) < 0.001
 Median [Min, Max] 11.0 [4.00, 19.0] 1.00 [0, 8.00]  
FIQ score
 Mean (SD) 44.2 (14.8) 15.3 (5.48) < 0.001
 Median [Min, Max] 47.3 [8.57, 70.1] 13.2 [10.0, 32.3]  
 Missing 1 (2.0 %) 0 (0 %)  
PCS score
 Mean (SD) 17.6 (10.2) 2.65 (3.56) < 0.001
 Median [Min, Max] 16.0 [0, 48.0] 1.00 [0, 13.0]  
PSS score
 Mean (SD) 19.5 (7.74) 7.74 (4.15) < 0.001
 Median [Min, Max] 20.0 [3.00, 35.0] 7.00 [2.00, 19.0]  
 Missing 1 (2.0 %) 0 (0 %)  
STAI-A score
 Mean (SD) 40.7 (9.85) 29.2 (3.81) < 0.001
 Median [Min, Max] 39.0 [27.0, 73.0] 29.0 [23.0, 38.0]  
STAI-B score
 Mean (SD) 45.0 (9.68) 28.3 (5.27) < 0.001
 Median [Min, Max] 46.0 [25.0, 64.0] 27.0 [21.0, 44.0]  
 Missing 3 (5.9 %) 1 (3.2 %)  
  1. FM Fibromyalgia patients, p-value: Mann-Whitney U test, ACR2016 American College of Rheumatology 2016 modified diagnostic criteria, FIQ Fibromyalgia Impact Questionnaire, PCS Pain Catastrophizing Scale, PSS Perceived Stress Scale, STAI-A State-Trait Anxiety Inventory A (State Anxiety), STAI-B State-Trait Anxiety Inventory B (Trait Anxiety), SD standard deviation