| Post-exertional malaise | 26/26 (100) | 135/140 (96.4) | 1 |
| Unrefreshing sleep | 24/26 (92) | 134/140 (95.7) | 0.6 |
| Subjective memory problems | 21/28 (75) | 116/139 (83.6) | 0.29 |
| Headaches | 21/26 (80.8) | 106/141 (75.2) | 0.6 |
| Muscle pain | 19/27 (70.4) | 103/141 (73.1) | 0.82 |
| Abdominal pain | 16/26 (61.5) | 68/138 (49.3) | 0.29 |
| Tender lymph nodes | 13/26 (50) | 62/140 (44.3) | 0.67 |
| Joint pain | 16/27 (59.2) | 94/140 (67.1) | 0.51 |
| Sore throat | 16/26 (61.5) | 80/140 (57.1) | 0.83 |
| Dizziness | 13/26 (50) | 79/137 (57.7) | 0.52 |
| Nausea | 14/27 (51.9) | 81/139 (58.3) | 0.67 |
| Noise sensitivity | 10/26 (38.5) | 48/136 (35.3) | 0.82 |
| Light sensitivity | 7/27 (25.9) | 33/136 (24.3) | 0.81 |
| Hypersensitivity to touch | 1/26 (3.85) | 20/137 (14.6) | 0.2 |