. Comparison of the recent vocal quality after operation on JO-RRP between the groups with the scoring of same vocal area
| Group 1 | Group 2 | Group 3 | ||||
|---|---|---|---|---|---|---|
| Comparison of the indexes | MDG | EG | MDG | EG | MDG | EG |
| Number of times for the operations | 12 | 23 | 23 | 35 | 15 | 17 |
| AVocal quality soon after operation (mean value) | 4.6 | 3.5 | 4.2 | 3.0 | 3.7 | 2.6 |
| t | 4.47 | 6.54 | 5.56 | |||
| P | 0.00 | 0.00 | 0.00 | |||