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| Before voice therapy | After voice therapy | p value | |
| VHI total | 40.8 ± 15.0 | 26.9 ± 10.5 | 0.0006 |
| VHI physical | 21.2 ± 6.7 | 15.7 ± 6.5 | 0.0026 |
| VHI functional | 10.2 ± 3.8 | 6.7 ± 3.8 | 0.011 |
| VHI emotional | 8.8 ± 6.1 | 4.7 ± 2.4 | 0.010 |
