Upper respiratory tract symptoms reported by colds and healthy groups on first testing session
| Symptom | Colds group | Healthy group | Significance p value |
| Pain in chest | 0.93 (0.23) | 0.0 (0.0) | <0.05 |
| Sore throat | 1.80 (0.24) | 0.2 (0.13) | <0.001 |
| Headache | 1.27 (0.267) | 0.0 (0.0) | <0.005 |
| Sneezing | 1.47 (0.29) | 0.10 (0.10) | <0.005 |
| Runny nose | 2.47 (0.19) | 0.40 (0.16) | <0.001 |
| Blocked nose | 1.93 (0.21) | 0.10 (0.10) | <0.001 |
| Hoarseness | 1.33 (0.30) | 0.0 (0.0) | <0.005 |
| Cough | 2.13 (0.26) | 0.20 (0.13) | <0.001 |
| Feeling hot/cold | 1.47 (0.24) | 0.10 (0.10) | <0.001 |
| Sweating | 1.20 (0.31) | 0.10 (0.10) | <0.05 |
| Shivering | 0.67 (0.21) | 0.00 (0.00) | 0.06 |
| Fever | 0.80 (0.30) | 0.00 (0.00) | 0.10 |
| Phlegm | 2.33 (0.30) | 0.20 (0.13) | <0.001 |
| Total symptom score | 19.80 (1.96) | 1.40 (0.27) | <0.001 |
Significance tested by a Mann–Whitney test. Scores are represented as means (SES).