Table 2 Characteristics of Study Sample (n=499)
All Subjects (n=499) | Classified as CFS | ||
|---|---|---|---|
1994 Case Definition Method | |||
Method 1 (n=59) | Method 2 (n = 71) | ||
Characteristicsa [values are n (%) | |||
Age in Yrs, Mean (SD) | 47.61 (9.84) | 46.76 (9.82) | 47.93 (9.90) |
Sex | |||
Female | 367 (73.55) | 49 (83.05) | 65 (91.55) |
Male | 132 (26.45) | 10 (16.95) | 6 (8.45) |
Race | |||
Black | 98 (19.64) | 8 (13.56) | 12 (16.90) |
White | 394 (78.96) | 48 (81.36) | 56 (78.87) |
All Others | 7 (1.40) | 3 (5.08) | 3 (4.23) |
Geographic Area | |||
Metropolitan | 93 (18.64) | 7 (11.86) | 8 (11.27) |
Urban | 161 (32.26) | 29 (49.15) | 39 (54.93) |
Rural | 245 (49.10) | 23 (38.98) | 24 (33.80) |
Married | 351(70.62) | 38 (64.41) | 46(64.79) |
Education | |||
≤ High School | 99 (19.84) | 15 (25.42) | 17 (23.94) |
Some College | 165 (33.07) | 22 (37.29) | 27 (38.03) |
≥ College | 233 (46.69) | 22 (37.29) | 27 (38.03) |
Type of onset | |||
Sudden | n/a | 10 (16.95) | 11 (15.49) |
Gradual | n/a | 46 (77.97) | 36 (50.70) |
Not known | n/a | 3 (5.08) | 24 (33.80) |
Duration Fatigue in Yrs, Mean (SD) | n/a | 12.13(8.92) | 12.26 (9.87) |