| Preoperative air conduction | Postoperative air conduction | Preoperative bone conduction | Postoperative bone conduction | Preoperative air-bone gap | Postoperative air-bone gap |
Localized otosclerosis | 55 | 20 | 10 | 10 | 45 | 10 |
Extended otosclerosis | 70 | 40 | 35 | 35 | 35 | 15 |
| p < 0.05 | p < 0.05 |