| Pain scores | ICNB（n=40） | PVB（n=38） | GA（n=39） | P |
| Ear pain at rest | 0.82±0.99 | 0.68± 0.97 | 0.56±0.74 | 0.06 |
| Ear pain during deep breath | 0.86±0.98 | 0.69±0.97 | 0.60±0.82 | 0.07 |
| Chest pain at rest | 2.00±1.43 | 2.16±1.37 | 1.74±1.60 | 0.07 |
| Chest pain during deep breath | 2.61±1.60 | 2.63±1.63 | 2.39±1.62 | 0.46 |
