St. George's Respiratory Questionnaire scores
| Group S | Group N | p‐value | |
| Patients n | 37 | 29 | |
| Overall score | 59.57±3.20 | 51.70±3.39 | ns |
| Symptom | 79.03±2.26 | 75.65±3.22 | ns |
| Activity | 67.66±4.30 | 60.63±5.31 | ns |
| Impact | 49.37±3.55 | 40.07±3.28 | ns |
Data are presented as mean±sem
ns: nonsignificant