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Table 1 Characteristics of Subjects in Cohort 1 Evaluated for XMRV.

From: Xenotropic murine leukemia virus-related virus is not associated with chronic fatigue syndrome in patients from different areas of the us in the 1990s

 

Chronic fatigue syndrome

Idiopathic chronic fatigue

Health blood donors

Non-CFS virus disease1

No. persons

61

6

9

3

XMRV+/-

9/52

0/6

0/9

0/3

Age, yrs

XMRV+/-

   

Mean

44/43

41

35

41

Median

45/43

42

31

41

Range

30-54/21-61

28-61

16-54

20-56

White (%)

100/94

100

100

67

Women (%)

100/75

83

88

67

Mean yrs. of illness

5/6

5

NA

NA

Residential geographic zone2 (%)

    

Midwest

56/36

67

50

33

Northeast

0/13

0

0

0

South

22/36

33

50

67

West

22/15

0

0

0

  1. CFS. chronic fatigue syndrome; NA, not applicable
  2. 1Non-CFS viral diseases: one case each of chronic active hepatitis B virus infection, echovirus 6 associated meningoencephalitis; and acute Epstein-Barr virus infection, early convalescent stage.
  3. 2Geographic zones based on Census Regions and Divisions of the United States, U.S. Department of Commerce Economics and Statistics Administration, U.S. Census Bureau