Table IV.
Parameters of voice analysis in teachers and controls. *Student's t-test or Mann-Whitney test.
| Teachers | Controls | P* | |||
|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||
| F0 (Hz) | 192.34 | 33.45 | 205.49 | 33.70 | <0.01 |
| Jitt% | 1.85 | 1.37 | 0.83 | 0.77 | <0.01 |
| Vf0% | 4.95 | 7.59 | 2.13 | 4.32 | <0.01 |
| Shim% | 7.31 | 3.19 | 4.34 | 2.02 | <0.01 |
| vAm% | 17.63 | 6.52 | 19.19 | 8.38 | 0.26 |
| NHR | 0.18 | 0.06 | 0.14 | 0.04 | <0.01 |
| VTI | 0.05 | 0.02 | 0.05 | 0.02 | <0.01 |
| SPI | 9.72 | 5.43 | 5.61 | 2.92 | <0.01 |
| FTRI% | 0.55 | 0.66 | 0.41 | 0.39 | 0.01 |
| ATRI% | 5.50 | 3.68 | 6.74 | 3.63 | 0.02 |
| DVB% | 0.74 | 2.67 | 0.69 | 5.94 | <0.01 |
| DSH% | 3.32 | 4.27 | 1.26 | 3.38 | <0.01 |