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. 2018 Apr 25;13(4):e0196329. doi: 10.1371/journal.pone.0196329

Table 1. Demographic and clinical data of the sample; values of t [82] or x2 and p of the group comparison (M = mean, SD = standard deviation).

FMS patients
N = 52
Control group
N = 32
t[82] / x2 p
Age (M ± SD) 51.25 ± 8.67 52.94 ± 6.59 -0.95 .35
Years of education (M ± SD) 9.27 ± 3.52 10.59 ± 3.64 -1.65 .10
BMI (M ± SD) 28.29 ± 4.49 26.49 ± 4.36 1.80 .075
Depression (N, %) 22 (42.30) 2 (6.25) 12.62 < .0001
Anxiety disorder* (N, %) 25 (48.08) 7 (21.88) 5.77 .016
Antidepressant medication (N, %)
Anxiolytic medication (N, %)
27 (51.92)
35 (67.31)
2 (6.26)
8 (25.00)
18.28
14.19
< .0001
< .0001
Non-opioid analgesic medication (N, %)
Opiate medication (N, %)
45 (86.5)
23 (44.2)
8 (25)
1 (31)
32.22
16.40
< .0001
< .0001
State-Trait Anxiety Inventory: State (M ± SD) 30.92 ± 11.92 17.19 ± 9.60 5.51 < .0001
State-Trait Anxiety Inventory: Trait (M ± SD) 35.29 ± 9.34 17.56 ± 10.24 8.14 < .0001
Beck Depression inventory (M ± SD) 21.90 ± 12.56 4.47 ± 5.67 7.39 < .0001
Fatigue Severity Scale (M ± SD) 50.56 ± 12.35 19.88 ± 11.14 11.92 < .0001
Oviedo Quality of Sleep Questionnaire: Insomnia (M ± SD) 29.73 ± 7.43 17.09 ± 7.52 7.91 < .0001
Oviedo Quality of Sleep Questionnaire: Hypersomnia (M ± SD) 8.67 ± 5.01 4.13 ± 1.56 4.98 < .0001
McGill Pain Questionnaire: Sensory Pain (M ± SD) 35.59 ± 18.39 12.38 ± 3.85 5.71 < .0001
McGill Pain Questionnaire: Affective Pain (M ± SD) 5.92 ± 4.50 0.72 ± 0.71 5.26 < .0001
McGill Pain Questionnaire: Miscellaneous Pain (M ± SD)
McGill Pain Questionnaire: Current Pain Intensity (M ± SD)
9.25 ± 5.90 4.14 ± 2.56 3.81 < .0001
3.31 ± 0.88 1.48 ± 0.51 8.97 < .0001

* Anxiety disorders comprise panic disorder, generalized anxiety disorder, phobias and adjustment disorder.