Comparison of mean (SD) pre-intervention symptom scores for participants in the treatment and placebo groups (Mann-Whitney U test)
| Score | Treatment(N = 43) | Placebo(N = 44) | p value |
|---|---|---|---|
| Total symptom | 32.9 (16.0) | 30.4 (12.9) | 0.634 |
| Breathing | 7.5 (4.1) | 6.9 (4.1) | 0.591 |
| Cough | 8.6 (3.0) | 7.7 (3.4) | 0.119 |
| Voice | 7.0 (5.8) | 7.8 (4.7) | 0.892 |
| Upper airway | 8.5 (6.4) | 7.8 (5.1) | 0.878 |
| Limitation | 2.3 (1.1) | 2.3 (1.1) | 0.715 |