Table 1.
Comparison of mean thresholds and standard deviation (SD) in the study and the control group
| Frequency (kHz) | Study group | Control group | t value |
|---|---|---|---|
| 0.25 K | |||
| Mean (dB) | 26.67 | 17.00 | 4.567*** |
| SD | 6.21 | 4.22 | |
| 0.5 K | |||
| Mean (dB) | 30.33 | 15.50 | 10.496*** |
| SD | 3.92 | 3.69 | |
| 1 K | |||
| Mean (dB) | 31.50 | 15.50 | 8.857*** |
| SD | 5.11 | 4.39 | |
| 2 K | |||
| Mean (dB) | 23.50 | 15.00 | 4.900*** |
| SD | 4.94 | 4.08 | |
| 4 K | |||
| Mean (dB) | 21.50 | 14.50 | 3.875*** |
| SD | 5.28 | 3.69 | |
| 8 K | |||
| Mean (dB) | 23.17 | 15.50 | 5.090*** |
| SD | 4.25 | 3.69 | |
| 10 K | |||
| Mean (dB) | 34.00 | 16.00 | 10.073*** |
| SD | 4.98 | 4.59 | |
| 12 K | |||
| Mean (dB) | 40.00 | 17.50 | 10.908*** |
| SD | 5.87 | 4.86 | |
| 16 K | |||
| Mean (dB) | 49.67 | 19.50 | 19.687*** |
| SD | 4.54 | 2.84 | |
kHz kilo Hertz, dB decibel, SD standard deviation
* P < 0.05, ** P < 0.01, *** P < 0.001