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Table 1 Demographic characteristics, clinical characteristics and antipolymer antibody (APA) levels of 285 fibromyalgia patients.

From: Antipolymer antibody in Italian fibromyalgic patients

  All fibromyalgia patients Patients with APA >30 U Patients with APA <30 U
Gender (females/males) 270/15 57/3 213/12
Age (years) (median (range)) 54 (19–82) 46 (19–74) 56 (20–82)
Tender points 14.29 ± 0.29 13.88 ± 0.83 14.30 ± 0.34
Tender Point Index 2.17 ± 0.04 2.17 ± 0.12 2.19 ± 0.04
Onset disease 9.19 ± 0.60 8.77 ± 1.19 10.11 ± 0.67
Fibromyalgia Impact Questionnaire 58.21 ± 1.22 55.89 ± 2.59 58.46 ± 1.39
Tiredness 6.96 ± 0.17 7.16 ± 0.41 6.88 ± 0.19
Pain 6.80 ± 0.17 6.31 ± 0.42 6.87 ± 0.18
  1. Results expressed as the mean ± standard error of the mean. The Tender Point Index was calculated as the sum of each positive tender point score divided by the total number of tender points.