| Variables | Before TPE | After TPE | P | ||
| Number | Percentage | Number | Percentage | ||
| Good | 24 | 75 | 29 | 90.6 | 0.134 |
| Minimal compliance problems | 6 | 18.8 | 3 | 9.3 | 0.251 |
| Bad | 1 | 3.1 | 0 | 0 | 0.215 |
| No previous treatment | 1 | 3.1 | 0 | 0 | 0.215 |