Characteristics of the professional athlete participants
| Athletes | Number | Percentage |
| Gender | ||
| Male | 48 | 81 |
| Female | 11 | 19 |
| Sports | ||
| Rugby | 50 | 85 |
| Forwards | 31 | 62 |
| Backs | 19 | 38 |
| Judo | 6 | 10 |
| Soccer (Football Association) | 1 | 2 |
| Football | 1 | 2 |
| Handball | 1 | 2 |
| Athletic level | ||
| International | 39 | 66 |
| National | 20 | 34 |
| History of injury | ||
| Previous concussion | 44 | 75 |
| Mean number ±SEM | 2.75±0.33 concussions | |
| Max/min | 12/1 concussions | |
| No previous concussion | 15 | 25 |
| Neurologist evaluation | ||
| Mean delay 48 hours—return to play | 20.61±2.47 days | |
| Max/min delay | 84/2 days | |
| Mean delay before return to play | 26.08±2.78 days | |