Table 2.
The DPOAE amplitudes in normal controls vs. patients underwent methadone maintenance treatment (MMT).
| Group | Frequency (Hz) | |||||
|---|---|---|---|---|---|---|
| 1,000 | 2,000 | 3,000 | 4,000 | 60,000 | 8,000 | |
| RIGHT EAR | ||||||
| MMT | 11.92 (5.62) |
10.81 (3.28) |
8.44 (5.31) |
6.35 (7.08) |
3.28 (5.54) |
2.79 (3.64) |
| Control | 11.35 (7.80) |
11.07 (6.62) |
12.75 (5.34) |
10.06 (4.76) |
8.47 (3.91) |
7.38 (4.45) |
| p-value | NS | NS | <0.001 | <0.001 | <0.001 | <0.001 |
| LEFT EAR | ||||||
| MMT | 11.38 (5.74) |
11.65 (3.90) |
7.34 (5.76) |
6.79 (4.13) |
6.35 (7.08) |
1.84 (3.77) |
| Control | 12.06 (5.74) |
12.58 (4.54) |
10.45 (6.27) |
11.23 (5.83) |
10.02 (4.76) |
6.12 (4.83) |
| p-value | NS | NS | 0.031 | <0.001 | <0.001 | <0.001 |
All data are expressed as mean (SD) dB SPL; DPOAE, Distortion-Product Otoacoustic Emission; NS, Not significant.