Characteristics of the groin problems reported during the 28 weeks of the competitive season for players included in the intention-to-treat analysis
| Intervention group (n=844 groin problems) | Control group (n=1321 groin problems) | |
| Time loss (%) | 41 | 33 |
| Gradual onset (%) | 78 | 79 |
| Acute onset (%) | 22 | 21 |
| Dominant leg (%) | 45 | 44 |
| Non-dominant leg (%) | 35 | 34 |
| Both legs (%) | 20 | 22 |