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Table 5 Fibromyalgia (1990 Criteria) [8] and pressure - induced pain thresholds in Cohort 2 (mean [95% confidence intervals]; probability).

From: Migraine headaches in Chronic Fatigue Syndrome (CFS): Comparison of two prospective cross-sectional studies

  HC All CFS CFS+MO CFS+MA CFS+T
  n = 20 N = 67 n = 40 n = 16 n = 10
Widespread pain 10.0% 50.0% P = 0.0010* 55.3% p = 0.0006* 46.2 p = 0.02* 33.3%
Manual pressure at ≥ 11/18 Points 5.6% 55.4% p = 0.00005* 64.1% p = 0.000013* 56.3% p = 0.001* 20.0% p = 0.014**
Fibromyalgia 0% 37.7% P = 0.0004* 47.4% P = 0.00007* 28.5% p = 0.022* 11.1% p = 0.03**
Systemic pain threshold (kg) 5.23 [3.95-6.52] 2.90 [2.47-3.32] p = 0.0002 2.36 [1.95-2.78] P = 0.00001 3.51 [2.53-4.48] 3.94 [2.67-5.20] p = 0.025 ††
Sinus pain threshold (kg) 1.91 [0.37-2.45] p = 0.0002 0.87 [0.71-1.03] p = 0.0001 1.18 [0.86-1.51] 1.30 [0.90-1.71]
  1. Fisher's Exact Test vs.* HC and vs. ** CFS+MO. 2-tailed unpaired Student's tests with Bonferonni corrections following ANOVA (p < 0.05) vs. HC and vs. †† CFS+MO.