Factors predictive of symptoms in building B
| Symptom | Environmental factor | p Value |
| Stuffy nose | ||
| Runny nose | ||
| Itchy eyes | Reduced relative humidity | <0.01 |
| Dry throat | ||
| Headache | Particulates (0.3–0.5 μm) | <0.001 |
| Reduced relative humidity | <0.001 | |
| Lethargy | Particulates (10 μm) | <0.01 |
| Dry skin | Particulates (3–5 μm) | <0.001 |