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Modified Siegel criteria for hearing recovery outcomes.
| Level of hearing recovery | Final hearing level (dB), gain (dB) |
| Complete recovery | ≤25 |
| Partial recovery | 26-40, >15 |
| Slight improvement | 41-70, >15 |
| No improvement | 71-90, <15 |
| Nonserviceable ear | >90 |
