| Patient Group | Migration percent |
| I | 2.56 |
| II | 7.15 |
| III | 2.21 |
| IV | 2.1 |
| V | 0.13 |
| VI | 2.47 |
| VII | 5.54 |
| VIII | 0.57 |
| IX | 12.31 |
| X | 6.19 |
| XI | 5.52 |
| XII | 0.69 |
| XIII | 1.52 |
| XIV | 10.19 |
| XV | 12.52 |
| XVI | 2.16 |
| XVII | 2.33 |
| XVIII | 11.21 |
| XIX | 4.62 |
| XX | 0 |
| XXI | 8 |