TABLE 6.
Comparison of auditory function in affected ears stratified by disease duration.
| Audiometric parameter | Short duration (< 10 years) (n = 42) | Medium duration (10–20 years) (n = 51) | Long duration (> 20 years) (n = 35) | F-value | P-value |
|---|---|---|---|---|---|
| Air-conduction threshold (dB HL) | |||||
| 0.5 kHz | 41.58 ± 8.24 | 46.13 ± 7.85* | 49.86 ± 6.42*# | 11.42 | <0.001 |
| 1 kHz | 44.92 ± 6.37 | 49.18 ± 5.62* | 53.27 ± 6.08*# | 18.58 | <0.001 |
| 2 kHz | 48.65 ± 10.35 | 53.82 ± 9.41* | 58.46 ± 7.23*# | 10.93 | <0.001 |
| 4 kHz | 51.73 ± 9.28 | 55.94 ± 10.52* | 60.85 ± 7.16*# | 9.18 | <0.001 |
| Bone-conduction threshold (dB HL) | <0.001 | ||||
| 0.5 kHz | 19.87 ± 6.45 | 23.15 ± 7.32* | 26.38 ± 5.91*# | 9.11 | <0.001 |
| 1 kHz | 22.46 ± 7.23 | 26.58 ± 6.24* | 30.15 ± 9.87*# | 9.63 | <0.001 |
| 2 kHz | 25.18 ± 4.41 | 29.42 ± 7.35* | 32.85 ± 5.92*# | 15.20 | <0.001 |
| 4 kHz | 28.34 ± 6.27 | 32.67 ± 8.38* | 36.28 ± 7.15*# | 11.11 | <0.001 |
| Speech recognition rate (%) | 82.56 ± 9.45 | 77.83 ± 11.72* | 72.15 ± 10.86*# | 8.89 | <0.001 |
*P < 0.05 compared with the short disease duration group. #P < 0.05 compared with the medium disease duration group.