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Table 1 Background variables of FM patients (N = 100) and controls (N = 50). (Values are expressed as mean ± SD).

From: Muscle modifications in fibromyalgic patients revealed by surface electromyography (SEMG) analysis

  FM Controls
Age (years) 48.10 ± 11.96 48.60 ± 11.18
Duration of disease (years) 6.04 ± 6.12 -
FIQ 60.95 ± 17.48 8.50 ± 5.72
TP 15.49 ± 4.33 2.75 ± 1.80
Fatigue 7.15 ± 2.46 0.25 ± 0.40
Pain 7.01 ± 2.46 0
Stiffness 6.95 ± 2.45 1.60 ± 2.10
  1. FIQ: Fibromyalgia Impact Questionnaire; TP: tender point.