|
| Mean scores | Endoscopic | CWU | CWD | Combined | Total |
| >13 age group | Preoperative PTA (dB) | 49.0 | 48.0 | 45.8 | 51.0 | 48.4 |
| Postoperative PTA (dB) | 42.6 | 43.1 | 41.6 | 54.0 | 47.4 | |
| Delta | 6.4 | 4.9 | 4.2 | −3.0 | 1.0 | |
| <13 age group | Preoperative PTA (dB) | 46.3 | 45 | 60 | 50 | 50.3 |
| Postoperative PTA (dB) | 30.6 | 42 | 42.5 | 45 | 40 | |
| Delta | 15.7 | 3.0 | 17.5 | 5.0 | 10.3 |