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Table 1 Baseline socio-demographic and clinical characteristics based on employment status of the study population (n = 1086)

From: Unemployment and work disability in individuals with chronic fatigue syndrome/myalgic encephalomyelitis: a community-based cross-sectional study from Spain

  Employed (n = 450) Unemployed (n = 636) P-valueb
Gender    0.959
 Female 405 (90.0) 573 (90.1)  
 Male 45 (10.0) 63 (9.9)  
Age group, years    0.004**
 ≤ 40 123 (27.3) 130 (20.4)  
 41–50 182 (40.4) 246 (38.7)  
 >  50 145 (32.2) 260 (40.9)  
Age at onset, years    0.002**
 Fatigue 36 ± 10.3 37.8 ± 9.5  
 Pain 36.6 ± 10.2 38.4 ± 9.6  
Illness duration, years 9 ± 7.6 10.5 ± 8.6 0.839
Comorbid conditionsa
 Fibromyalgia 207 (46.0) 394 (62.0) <  0.001***
 Degenerative vertebral disease 220 (49.0) 376 (59.3) 0.001***
 Epicondylitis 187 (41.6) 310 (48.9) 0.018*
 Ligamentous hyperlaxity 130 (28.9) 235 (37.1) 0.005**
 Multiple chemical hypersensitivity 135 (30.1) 230 (36.2) 0.035**
 Carpal tunnel syndrome 62 (13.8) 122 (19.2) 0.018*
Marital status    0.028**
 Married 272 (60.6) 428 (67.4)  
 Single 107 (23.8) 107 (16.9)  
 Separated/divorced 60 (13.4) 90 (14.2)  
 Widow 10 (2.2) 10 (1.6)  
Profession    <  0.001***
 Unskilled work 213 (47.3) 262 (41.2)  
 Skilled work 105 (23.3) 179 (28.1)  
 Administrative/office work 92 (20.4) 111 (17.5)  
 Education/teaching 14 (3.1) 15 (2.4)  
 Self-employed 7 (1.6) 7 (1.1)  
 Liberal profession 16 (3.6) 23 (3.6)  
 Arts and crafts 1 (0.2) 5 (0.8)  
 Student 2 (0.4) 1 (0.2)  
 Housewife 0 (0) 33 (5.2)  
Educational level    0.506
 Elementary (primary) school 69 (15.3) 109 (17.1)  
 Graduate 66 (14.7) 105 (16.5)  
 High school/vocational training 188 (41.8) 248 (39.0)  
 University 126 (28.0) 169 (26.6)  
 Literate 1 (0.2) 5 (0.8)  
  1. Data are given as numbers of cases (percentages) unless otherwise indicated
  2. *Significance at 0.05
  3. **Significance at 0.01
  4. ***Significance at 0.001
  5. a Because participants may report more than one comorbid illness, column numbers do not add up to the total sample. b Data analysis was performed using Chi-square test for categorical variables