Individual symptoms of the BRS index tested against the PF
| Symptom | p value |
|---|---|
| Statistics: 2×2 χ2 test. | |
| At least 2 symptoms of the mucous membrane and skin | 0.033 |
| Eye irritation | |
| Running eyes | 0.747 |
| Itching eyes | 0.046 |
| Nose irritation | |
| Itching nose | 0.994 |
| Nose congestion | 0.026 |
| Irritation of the throat | |
| Hoarseness | 0.657 |
| Dry throat | 0.269 |
| Itching/flushing facial skin | |
| Dry skin | 0.421 |
| Prickly sensation of the skin | 0.077 |
| At least one symptom from the central nervous system | 0.004 |
| Headache | 0.068 |
| Fatigue | 0.031 |
| Difficulties to concentrate | 0.524 |