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Table 1 Demographic characteristics and comorbidities of patients newly diagnosed with chronic fatigue syndrome in Taiwan between 2000 and 2012 and of those in the control group

From: Treatments of chronic fatigue syndrome and its debilitating comorbidities: a 12-year population-based study

Variable

CFS cohort

Non-CFS cohort

P-value

(n = 6306)

(n = 6306)

Gender

  

> 0.99

 Female

3339 (52.9)

3339 (52.9)

 

 Male

2967 (47.1)

2967 (47.1)

 

Age at diagnosis of CFS

  

> 0.99

 ≤ 34

1350 (21.4)

1350 (21.4)

 

 35–64

3485 (55.3)

3485 (55.3)

 

 ≥ 65

1471 (23.3)

1471 (23.3)

 

Age at diagnosis of CFS(mean, SD)†

50.6 (17.9)

50.6 (18.0)

0.80

Comorbidity

   

 Depression

807 (12.8)

407 (6.45)

< 0.0001

 Anxiety disorder

2038 (32.3)

1033 (16.4)

< 0.0001

 Insomnia

2303 (36.5)

1106 (17.5)

< 0.0001

 Suicide

19 (0.30)

12 (0.19)

0.20

 Crohn's disease

255 (4.04)

121 (1.92)

< 0.0001

 Ulcerative colitis

279 (4.42)

138 (2.19)

< 0.0001

 Renal disease

585 (9.28)

427 (6.77)

< 0.0001

 T1DM

78 (1.24)

68 (1.08)

0.40

 T2DM

1473 (23.3)

1068 (16.9)

< 0.0001

 Obesity

93 (1.47)

64 (1.01)

0.01

 Gout

1196 (18.9)

702 (11.1)

< 0.0001

 Dyslipidemia

2252 (35.7)

1356 (21.5)

< 0.0001

 Malignancy

407 (6.45)

487 (7.72)

0.01

 HIV

3 (0.05)

3 (0.05)

> 0.99

 Rheumatoid arthritis

254 (4.03)

155 (2.46)

< 0.0001

 Psoriasis

94 (1.49)

83 (1.32)

0.40

 Ankylosing spondylitis

53 (0.84)

39 (0.62)

0.14

 Lymphadenopathy

132 (2.09)

104 (1.65)

0.06

 Hashimoto's thyroiditis

13 (0.21)

10 (0.16)

0.53

 Sjogren's syndrome

110 (1.74)

71 (1.13)

0.003

 Irritable bowel syndrome

886 (14.1)

423 (6.71)

< 0.0001

 Fibromyalgia

4905 (77.8)

4914 (77.9)

0.85

 SLE

4 (0.06)

9 (0.14)

0.16

 Herpes zoster

341 (5.41)

234 (3.71)

< 0.0001