Factor analysis of symptoms with three retained factors
| Factor 1 (Musculoskeletal) | Factor 2 (Migraine) | Factor 3 (Sore throat) | |
|---|---|---|---|
| Memory problems | −0.03 | −0.03 | −0.14 |
| Sore throat | −0.03 | 0.05 | 0.83 |
| Tender lymph nodes | 0.30 | −0.06 | 0.61 |
| Muscle pain | 0.80 | 0.20 | 0.13 |
| Joint pain | 1.00 | 0.00 | 0.06 |
| Headaches | 0.19 | 0.53 | 0.15 |
| Abdominal pain | 0.19 | 0.31 | 0.24 |
| Nausea | 0.13 | 0.35 | 0.13 |
| Hypersensitive to touch | 0.38 | 0.41 | −0.12 |
| Hypersensitive to noise | −0.08 | 0.65 | −0.17 |
| Hypersensitive to light | −0.06 | 0.66 | −0.04 |
| Dizziness | 0.14 | 0.30 | 0.11 |
Loadings with magnitude greater than 0.3 are shown in boldface (n=333).