Table 5.
Symptom classification (N = 169).
| Symptom category | Number (%) |
|---|---|
| Fatigue | 169 (100) |
| Pains (muscle, joints, including headaches/migranes) | 151 (89.3) |
| Cognitive impairments | 149 (88.2) |
| Post-Exertional malaise (PEM) | 144 (85.2) |
| Noise sensitivity | 139 (82.2) |
| Sleep disturbance | 130 (76.9) |
| Muscle weakness | 127 (75.1) |
| Gastro-intestinal symptoms (e.g. vomiting, nausea, diarrhea, constipation, bloating) | 110 (65.1) |
| Light sensitivity | 106 (62.7) |
| Neurological symptoms | 100 (59.2) |
| Neurological sensory symptoms | 94 (55.6) |
| Alcohol intolerance | 94 (55.6) |
| Feeling hot | 91 (53.8) |
| Heart symptoms | 88 (52.1) |
| Feeling cold | 86 (50.9) |
| Respiratory symptoms | 80 (47.3) |
| Sore throat | 77 (45.6) |
| Odor intolerance | 67 (39.6) |
| Drug intolerance | 63 (37.3) |
| Enlarged/painful lymph nodes | 59 (34.9) |
| Sub-febrile/fever bouts | 49 (29.2) |
| Other symptoms | 30 (17.7) |