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Table 1 Baseline characteristics of patients and healthy control subjects

From: Cortisol and hypothalamic–pituitary–gonadal axis hormones in follicular-phase women with fibromyalgia and chronic fatigue syndrome and effect of depressive symptoms on these hormones

  Patients Controls
  Fibromyalgia Chronic fatigue syndrome  
Variable (N = 68) (N = 62) (N = 46)
Age (years) 31.43 ± 7.81 32.55 ± 6.61 31.54 ± 6.86
Disease duration (years) 3.96 ± 4.23 4.28 ± 4.12 -
FIQ score 59.23 ± 10.28 - 12.83 ± 7.21
Pain intensity (VAS) 5.03 ± 1.18 4.49 ± 1.83 0.47 ± 0.880
Tender point count 13.18 ± 1.79 6.49 ± 3.51 3.49 ± 2.81
Symptoms experienced [No. (%)]    
   Morning stiffness 42 (62) 24 (39) 3 (7)
   Muscle spasm 39 (57) 15 (24) 2 (4)
   Fatigue 48 (71) 62 (100) 4 (9)
   Skinfold tenderness 56 (82) 29 (47) 2 (4)
   Sleep disturbance 54 (79) 27 (44) 2 (4)
   Cigarette smoking 31 (46) 30 (48) 26 (57)
Menstrual cycle    
   Age at menarche 12.91 ± 0.28 13.02 ± 0.25 13.14 ± 0.21
   Cycle length (days) 13.14 ± 0.21 28.87 ± 0.19 29.07 ± 0.27
   Days of menstrual flow 4.82 ± 0.36 4.97 ± 0.28 4.89 ± 0.32
Marital status [No. (%)]    
   Married 45 (66) 39 (63) 28 (61)
   Single 13 (20) 14 (23 10 (23)
   Divorced 7 (12) 6 (10) 4 (9)
   Other 3 (2) 3 (4) 3 (7)
Highest educational level achieved [No. (%)]    
   Elementary school 31 (46) 30 (48) 20 (44)
   Secondary school 15 (22) 13 (21) 13 (28)
   University/High school 22 (32) 19 (31) 13 (28)
Employment status [No. (%)]    
   Unemployed 5 (7) 5 (8) 3 (7)
   Employed 7 (10) 5 (8) 7 (15)
   Retired 3 (4) 4 (6) 2 (4)
   Homemaker 39 (58) 37 (60) 24 (52)
   Student 11 (16) 8 (13) 7 (15)
   Others 3 (5) 3 (5) 3 (7)
  1. Values are means ± standard deviation, except where indicated as number and percentage of the group. FIQ, Fibromyalgia Impact Questionnaire; VAS: Visual Analog Scale; -, not applicable.