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 (%) | Â | Â | Â | Â | Â |
   <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 (%) | Â | Â | Â | Â | Â |
   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 |