| Classification | n | Definition |
|---|---|---|
| Complete recovery | 12(36.4) | Final PTA ≤ 25㏈ |
| Partial recovery | 1(3.0) | Final > 25㏈, Gain ≥ 15㏈, Final ≤ 45㏈ |
| Slight improvement | 2(6.1) | Final > 45㏈, Gain ≥ 15 ㏈ |
| No improvement | 18(54.5) | Gain < 15㏈, Final PTA > 75㏈ |
| Total improvement | 15(45.5) | Complete + Partial + Slight |