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Mean air-bone (AB) gap at various intervals
| Study groups | Preoperative AB gap (dB) (1) | Post-operative AB gap at 1st month (dB) | Post-operative AB gap at 3rd month (dB) (2) | Post-operative closure of AB gap 1–2 (dB) |
|---|---|---|---|---|
| Vein graft group | 22.75 | 11.7 | 6.5 | 16.25 |
| Temporalis fascia graft group | 21.63 | 10.5 | 5.7 | 15.93 |
