Table 8.
Comparison of distortion product otoacoustic emissions levels without and with contralateral acoustic stimulation for particular distortion product otoacoustic emissions f1 frequencies (mean ± standard deviation) in three age groups
| Distortion product otoacoustic emissions f1 | Distortion product otoacoustic emissions level without contralateral acoustic stimulation | Distortion product otoacoustic emissions level with contralateral acoustic stimulation | Adj P |
|---|---|---|---|
| 10–25 years | |||
| 977 Hz | 12.7±5.3 | 11.3±5.1 | 0.00 |
| 1,160 Hz | 12.8±7.0 | 11.8±6.4 | 0.00 |
| 1,379 Hz | 12.8±5.4 | 11.7±5.2 | 0.00 |
| 1,636 Hz | 11.0±5.5 | 10.1±5.3 | 0.00 |
| 1,953 Hz | 10.0±5.5 | 8.9±5.6 | 0.00 |
| 2,319 Hz | 9.0±5.2 | 8.4±4.8 | 0.18 |
| 2,759 Hz | 10.3±5.5 | 10.1±5.5 | 1.00 |
| 3,284 Hz | 11.0±5.9 | 10.7±5.9 | 1.00 |
| 3,894 Hz | 12.5±6.5 | 12.2±6.4 | 1.00 |
| 4,639 Hz | 11.6±7.0 | 11.0±7.1 | 0.05 |
| 5,164 Hz | 7.6±7.9 | 7.3±7.8 | 1.00 |
| 26–40 years | |||
| 977 Hz | 10.7±5.6 | 8.5±6.1 | 0.00 |
| 1,160 Hz | 11.9±5.2 | 10.6±5.3 | 0.00 |
| 1,379 Hz | 10.9±5.1 | 9.6±5.3 | 0.00 |
| 1,636 Hz | 8.6±5.2 | 7.7±5.4 | 0.00 |
| 1,953 Hz | 7.8±5.6 | 6.7±5.5 | 0.00 |
| 2,319 Hz | 6.7±5.9 | 5.9±5.7 | 0.00 |
| 2,759 Hz | 7.5±5.7 | 6.9±5.5 | 0.00 |
| 3,284 Hz | 8.8±5.7 | 8.2±6.0 | 0.03 |
| 3,894 Hz | 10.0±6.5 | 9.3±6.5 | 0.01 |
| 4,639 Hz | 9.2±7.0 | 8.3±7.4 | 0.00 |
| 5,164 Hz | 5.9±8.1 | 5.2±8.8 | 0.08 |
| 41–60 years | |||
| 977 Hz | 10.0±5.0 | 8.7±5.0 | 0.00 |
| 1,160 Hz | 11.1±6.2 | 9.9±6.4 | 0.00 |
| 1,379 Hz | 9.1±4.7 | 8.3±4.4 | 0.07 |
| 1,636 Hz | 7.1±4.2 | 6.3±4.3 | 0.01 |
| 1,953 Hz | 5.1±4.5 | 4.2±4.4 | 0.00 |
| 2,319 Hz | 4.3±5.9 | 3.5±5.9 | 0.09 |
| 2,759 Hz | 2.5±4.6 | 2.3±4.5 | 1.00 |
| 3,284 Hz | 4.0±5.6 | 3.6±5.8 | 1.00 |
| 3,894 Hz | 5.4±6.7 | 5.0±7.0 | 1.00 |
| 4,639 Hz | 3.2±6.9 | 3.4±7.1 | 1.00 |
| 5,164 Hz | −0.8±8.0 | −0.8±8.2 | 1.00 |
Note: Significant differences are presented in bold.
Abbreviation: Adj P, Bonferroni adjusted P-values.