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Table 3 Demographics and rates of fibromyalgia and chronic fatigue syndrome occurring alone or together

From: Chronic fatigue syndrome and fibromyalgia in diagnosed sleep disorders: a further test of the ‘unitary’ hypothesis

  Healthy controls (n = 39) SDB (AHI 5–14; n = 36) SDB (AHI >14; n = 86) SDB (n=122) Insomnia (n=21) SDB vs. Insomnia (p value)
Men, % (n) 44 (17) 50 (18) 76 (65) 68 (83) 38 (9) .009
Age (SD), y 42.9 (15.0) 50.3 (11.2) 51.8 (12.0) 51.4 (11.7) 37.8 (8.7) .000
BMI (SD), kg/m2 25.1 (4.0) 30.7 (5.0) 31.6 (4.2) 31.3 (4.5) 29.4 (5.2) .070
AHI (SE) 1.8 (0.3) 9.6 (0.6) 39.7 (2.5) 30.8 (2.1) 1.9 (0.3) .000
RDI (SE) 2.8 (0.4) 12.2 (0.8) 42.2 (2.4) 33.3 (2.1) 2.7 (0.4) .000
FM only, % (n) 0 (0) 0 (0) 0 (0) 0 (0) 14 (3) .003
CFS only, % (n) 0 (0) 14 (5) 8 (7) 10 (12)1 19 (4)3 .189
CFS + FM, % (n) 0 (0) 3 (1) 4 (3) 3 (4)2 14 (3)4 .065
No CFS or FM, % (n) 100 (39) 83 (30) 88 (76) 87 (106) 52 (11) .001
With CFS or FM, % (n) 0 (0) 17 (6) 12 (10) 13 (16) 48 (10) .001
  1. SDB = sleep disordered breathing; BMI = body mass index; FM = fibromyalgia; CFS = chronic fatigue syndrome.
  2. 1One man in this group had well controlled diabetes and well controlled hypertension.
  3. 2One woman in this group had well controlled diabetes and well controlled hypothyroidism.
  4. 3One man in this group had well controlled hypothyroidism.
  5. 4Two women in this group had well controlled hypertension.