Table 3 Mean and standard deviation of hearing level in dB for each frequency at baseline and mean and standard deviation of change in hearing level (average of R & L ear).
Frequency (Hz) | Baseline – All subjects (dB) | Baseline – Subjects with follow up (dB) | Change at 16 wks* (dB) | Change at 32 wks* (dB) |
|---|---|---|---|---|
Number of subjects | 33 | 23 | 22 | 19 |
250 | 13.3 +/- 8.0 | 14.8 +/- 8.3 | -1.6 +/- 5.1 | -2.1 +/- 5.1 |
500 | 11.3 +/- 8.6 | 12.7 +/- 9.8 | -0.6 +/- 5.1 | -2.1 +/- 5.1 |
1000 | 11.2 +/- 9.8 | 11.4 +/- 11.3 | -0.6 +/- 3.2 | 0.0 +/- 3.0 |
2000 | 9.6 +/- 12.0 | 11.3 +/- 13.1 | -0.5 +/- 3.9 | 0.0 +/- 2.8 |
3000 | 13.6 +/- 13.7 | 16.1 +/- 14.8 | -0.3 +/- 4.5 | 0.0 +/- 2.8 |
4000 | 17.4 +/- 14.9 | 19.1 +/- 15.8 | -0.9 +/- 4.5 | -1.1 +/- 5.7 |
6000 | 20.5 +/- 13.7 | 22.6 +/- 14.7 | 0.6 +/- 5.6 | -0.2 +/- 6.9 |
8000 | 23.4 +/- 14.5 | 25.0 +/- 15.0 | -2.2 +/- 5.6 | -0.4 +/- 7.2 |
12000 | 36.3 +/- 19.7 | 37.9 +/- 19.1 | -0.6 +/- 8.4 | 0.0 +/- 11.4 |
Low Freq PTA | 11.5 +/- 9.8 | 12.1 +/- 10.8 | -0.6 +/- 2.5 | -0.9 +/- 2.0 |
High Freq PTA | 20.4 +/- 13.4 | 22.2 +/- 14.2 | -0.8 +/- 4.8 | -0.6 +/- 5.2 |