Table 4.
Hearing gain in two groups of patients studied
| Hearing Gain | Buttonhole | Underlay |
|---|---|---|
| <=5 | 02 | 08 |
| 6–10 | 15 | 11 |
| > 10 | 13 | 11 |
| Total | 30 | 30 |
| Mean ± SD | 9.33 ± 3.24 | 8.20 ± 3.39 |
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