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Table 1 Demographic Characteristics of the U.S. population and the Wichita Sample by Fatigue and Non-Fatigued Group

From: The economic impact of chronic fatigue syndrome

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
  1. * 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.