EHS of the two groups pretreatment and post-treatment
| Groups | I | II | III | IV | |
| Treatment group (n=30) | Before treatment | 6 | 13 | 11 | 0 |
| After treatment | 1 | 2 | 21 | 6 | |
| Control group (n=33) | Before treatment | 8 | 14 | 11 | 0 |
| After treatment | 4 | 4 | 23 | 2* |
*PEHS=0.041.
EHS, Erection Hardness Score.