Table 2.
Pre-op and post-op mean air-bone gap
| Patient No. | Side of ear | Pre-op audiogram findings | Mean ABG (dB HL) | ||
|---|---|---|---|---|---|
| Pre-op | Post-op 6 m | Post-op 30 m | |||
| 1 | Right | CHL | 28.25 | 14.75 | 9.25 |
| 2 | Right | CHL | 31.25 | 29.75 | 12.25 |
| 3 | Right | CHL | 29.75 | 10.25 | 6.0 |
| 4 | Left | CHL | 22.5 | 11.25 | 7.25 |
| 5 | Right | CHL | 26.25 | 26.5 | 17.25 |
| 6 | Left | CHL | 22.5 | 12.75 | 6.25 |
| 7 | Left | CHL | 26.75 | 20.25 | 11.25 |
| 8 | Left | Mixed HL | 28.5 | 21.25 | 10.75 |
| 9 | Left | CHL | 28.25 | 25.5 | 22.25 |
| 10 | Right | CHL | 29.75 | 18.55 | 10.25 |
| 11 | Right | CHL | 35.25 | 33.25 | 20.75 |
| 12 | Right | CHL | 37.5 | 28.5 | 11.25 |
| 13 | Left | CHL | 26.25 | 33.25 | 33.75 |
| 14 | Right | CHL | 25.75 | 20.5 | 9.25 |
| 15 | Right | CHL | 31.25 | 13.5 | 7.25 |
| 16 | Right | CHL | 32.25 | 11.25 | 10.5 |
| 17 | Left | CHL | 24.75 | 10.25 | 10.25 |
| 18 | Left | CHL | 29.25 | 8.75 | 8.25 |
| Mean (SD) | 28.7 (2.9) | 19.7 (7.3) | 12.8 (5.5) | ||
Mean air–bone gap was calculated from findings at 0.5, 1, 2 and 3/4 kHz. Only changes in mean air–bone gap of 5 dB HL or more were considered significant because of inter-test variability
Pre-op Pre-operative, post-op Post-operative, CHL Conductive hearing loss, HL Hearing loss