Table 1

Demographic Characteristics of the U.S. population and the Wichita Sample by Fatigue and Non-Fatigued Group

Demographic Characteristics

U.S. Population*

Wichita Surveillance Groups

Non-Fatigue Group (n = 3,634)

Prolonged Fatigue(n = 2,973)

Suspect CFS§ (n = 512)

CFS (n = 43)


Age, Mean (years)

41.0

40.5

42.7

44.1

47.8

<35 years (%)

35.6

37.3

29.1

18.9

8.3

35–49 years (%)

35.2

35.5

38.6

50.6

46.8

50–69 years (%)

29.2

27.2

32.3

30.6

45.0

Male (%)

49.1

49.3

34.7

29.1

14.6

Female (%)

50.9

50.7

65.3

70.9

85.4

Black (%)

12.1

8.5

11.2

5.5

2.8

Latino (%)

12.6

4.8

5.0

5.7

1.9

Employed (%)

78.4

76.5

64.1

68.4

52.8

Mean Household Income

NA

$33,477

$39,027

$44,143

$40,802

<$20,000 (%)

26.8

17.7

33.6

24.3

16.8

$20,000–$49,999 (%)

38.1

40.7

40.0

41.7

46.2

$50,000–$74,999 (%)

17.8

18.1

12.6

19.1

23.6

≥$75,000 (%)

17.4

12.7

6.6

8.2

5.4

Not Reporting (%)

0.0

10.8

7.1

6.6

8.1

Education (%)

<12 Years

14.9

7.8

14.8

8.5

2.7

High School Graduate

31.5

28.4

32.6

33.2

35.6

Some College

28.2

36.4

35.9

40.0

51.9

College Graduate (4-Year)

17.3

16.7

8.5

11.1

6.0

Post Graduate Education

8.2

8.9

5.8

4.7

3.7

Not Reporting

0.0

1.7

2.4

2.5

0.0

Occupation (%)

Management or Professional

23.4

27.1

20.3

25.9

16.8

Clerical Worker

10.3

10.2

12.1

12.8

22.8

Service Worker

10.6

6.9

9.4

7.4

10.7

Sales Professional

8.7

6.6

5.2

5.1

7.5

Technician

2.5

6.6

6.3

5.8

17.0

Skilled Craftsman

8.3

4.3

5.0

6.3

4.6

Homemaker

NA

1.9

2.4

2.3

3.5

Other/Not Reporting

36.2

36.2

39.3

34.4

17.2


* Based on analysis of the March Supplement to the Current Population Survey, 2002 conducted by SRA International, Inc. Columns may not add to 100% due to rounding. Weighted to reflect population of Wichita, Kansas. Columns may not add to 100% due to rounding. Excludes the 555 CFS-like observations. § Excludes the 43 CFS observations.

Reynolds et al. Cost Effectiveness and Resource Allocation 2004 2:4   doi:10.1186/1478-7547-2-4

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