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Comparison of preoperative and postoperative pure tone audiometry air-bone gaps
| Preoperative Air-Bone Gap (N = 1100) (%) | Postoperative Air-Bone Gap (N = 1100) (%) | |||||||
|---|---|---|---|---|---|---|---|---|
| Frequency | ≤10 dB | 11–20 dB | 21–30 dB | ≥30 dB | ≤10 dB | 11–20 dB | 21–30 dB | ≥30 dB |
| 500 Hz | 0 (0) | 65 (6) | 785 (71) | 250 (23) | 1095 (99.5) | 5 (0.5) | 0 (0) | 0 (0) |
| 1000 Hz | 0 (0) | 50 (5) | 820 (74) | 230 (21) | 1095 (99.5) | 5 (0.5) | 0 (0) | 0 (0) |
| 2000 Hz | 0 (0) | 50 (5) | 800 (72) | 250 (23) | 1095 (99.5) | 5 (0.5) | 0 (0) | 0 (0) |
