FSS score >5 or <5 on second follow-up (contact 2) and symptoms at contact 1
| Number of patients | FSS <5 | FSS >5 | p Value | |
|---|---|---|---|---|
| Males | 30 | 9 (25) | 21 (39) | 0.17 |
| Females | 60 | 27 (75) | 33 (61) | |
| Age debut of CFS | 23.8 (7.9) | 24.1 (7.0) | 0.85 | |
| Age (second control) | 33.6 (7.9) | 35.8 (6.9) | 0.17 | |
| First control (contact 1) | ||||
| Age (first control) | 26.8 (7.5) | 29.3 (7.0) | 0.11 | |
| FSS score (mean) | 6.3 (1.2) | 6.4 (.8) | 0.63 | |
| Duration of CFS (years sum, mean) | 3.3 (2.4) | 5.6 (4.5) | 0.006 | |
| Arthralgia | 89 | 11 (33) | 32 (59) | 0.010 |
| Myalgia | 89 | 24 (69) | 40 (74) | 0.57 |
| Headache | 89 | 25 (71) | 38 (70) | 0.92 |
| Sleeping disturbances | 90 | 23 (64) | 36 (67) | 0.79 |
| Depression | 89 | 8 (23) | 22 (41) | 0.081 |
| Concentration problems | 89 | 32 (91) | 50 (93) | 0.84 |
| Memory problems | 90 | 30 (83) | 41 (76) | 0.40 |
| Sore throat | 90 | 22 (61) | 26 (48) | 0.23 |
| Tender cervical lymph nodes | 90 | 13 (36) | 19 (35) | 0.93 |
| Physical activity: effect on fatigue | 70 | 0.94 | ||
| None | 1 (3) | 1 (3) | ||
| Worse | 11 (38) | 14 (35) | ||
| Much worse | 17 (59) | 25 (63) | ||
| Clinical change prior to first control | 71 | 0.06 | ||
| Improvement | 16 (55) | 12 (29) | ||
| No change | 4 (14) | 13 (31) | ||
| Worsening | 9 (31) | 17 (40) | ||
| Education | 89 | 0.08 | ||
| Primary school | 2 (6) | 7 (13) | ||
| High school | 6 (17) | 17 (32) | ||
| College or university | 28 (78) | 29 (55) |
CFS, chronic fatigue syndrome; FSS, Fatigue Severity Scale.