| Item |
Clonidine group (n=120) |
Dextromethorphan group (n=120) |
Placebo
group (n=120) |
P-value |
| Cough appearance, n (%) |
18 (15.0) |
14 (11.7) |
41 (34.2) |
< 0.001 |
| Cough severity, n (%) |
|
|
|
< 0.001 |
| Mild |
8 (6.7) |
8 (6.7) |
13 (10.8) |
|
| Moderate |
6 (5.0) |
6 (5.0) |
18 (15.0) |
|
| Severe |
4 (3.3) |
0 (0.0) |
10 (8.3) |
|
|
