Table 2 Distribution of Demographic Factors by Illness Group
Demographic Factor | CFS-like n = 49 | Chronic Fatigue n = 338 | Prolonged Fatigue n = 53 | Non-Fatigued n = 444 | p-value |
|---|---|---|---|---|---|
Age (mean ± SD) | 42.5 ± 10.6 | 46 ± 12.2 | 38.5 ± 13.9 | 43.2 ± 13.5 | p < 0.0001 |
Sex: n (%) | |||||
Male | 14 (28.5) | 101 (29.9) | 13 (24.5) | 200 (45.0) | p < 0.0001 |
Female | 35 (71.4) | 237 (70.1) | 40 (75.5) | 244 (54.9) | |
Race: n (%) | |||||
White | 44 (89.8) | 294 (86.9) | 43 (81.1) | 369 (83.1) | p = 0.75 |
Black | 3 (6.1) | 24 (7.1) | 8 (15.1) | 46 (10.4) | |
Other | 2 (4.1) | 20 (5.9) | 2 (3.8) | 29 (6.5) | |
Income* (median): n (%) | |||||
≤$40,000 | 21 (51.2) | 176 (57.7) | 33 (71.7) | 158 (41.9) | p < 0.0001 |
>$40,000 | 20 (48.8) | 129 (42.3) | 13 (28.3) | 219 (58.1) | |
Education:** n, (%) | |||||
< High school graduate | 8 (16.7) | 51 (5.8) | 11 (20.7) | 49 (11.4) | p = 0.19 |
High school graduate | 17 (34.7) | 140 (41.4) | 19 (35.8) | 150 (34.8) | |
Some college | 13 (27.1) | 77 (8.8) | 15 (28.3) | 105 (24.4) | |
College graduate | 6 (12.2) | 38 (11.2) | 3 (5.7) | 79 (18.3) | |
Post graduate | 4 (8.2) | 27 (7.9) | 5 (9.4) | 48 (11.1) |