Patient characteristics at assessment (n = 78)
| Age (years), mean (SE) | 14.2 (0.2) |
| Range | 9–17 years |
| Sex, n (%) | |
| Male | 29 (37) |
| Female | 49 (63) |
| Duration (months), mean (SE) | 27.1 (2.1) |
| Age of onset (years), mean (SE) | 12.2 (0.2) |
| Duration of follow up (months), mean (SE) | 10.3 (2.1) |
| Wellness score, mean (SE) | 52.0 (2.5) |
| School attendance, mean (SE) | 35.1 (4.2) |
| Severity of CFS, n (%) | |
| Severe | 47 (62) |
| Moderate | 22 (29) |
| Minimal | 7 (9) |