Table 2.
Measured hearing levels in decibel at pure tone averages
| 0.5-1-2 kHz AC mean (SD) median | 1-2-4 kHz AC mean (SD) median | 8-10-12.5 kHz mean (SD) median | 0.5-1-2 kHz BC mean (SD) median | 1-2-4 kHz BC mean (SD) median | |
|---|---|---|---|---|---|
| Number of ears | 72 | 72 | 67 | 66 | 66 |
| Before treatment | 20.3 (13.3) 16.7 | 28.6 (16.8) 25.0 | 75.4 (23.6) 74.8 | 17.4 (12.2) 14.1 | 24.3 (35.1) 20.8 |
| ST after treatment | 20.3 (15.4) 15.8 | 29.2 (18.9) 25.0 | 78.3 (22.3) 79.0 | 16.6 (12.7) 13.3 | 22.9 (15.1) 20.9 |
| LT after treatment | 22.1 (15.7) 18.3 | 31.5 (19.0) 29.2 | 82.7 (23.3) 82.9 | 17.3 (12.9) 13.3 | 23.2 (15.1) 20.0 |
| Difference ST and BT | 0 dB | 0.6 dB | 2.9 dB* | −0.8 dB | −1.4 dB |
| Difference LT and ST | 1.8 dB | 2.3 dB* | 4.4 dB* | 0.7 dB | 0.3 dB |
Abbreviations: ST Short-term, LT Long-term, BT Before Treatment, AC Air Conduction, BC Bone Conduction, SD Standard deviation, dB Decibel.
*Statistically significant (p < 0.05).