Breakdown of proposed sample size by group, gender and setting
| Sampling | Gender | Acute stage after the injury | Chronic stage after the injury | Total |
| mTBI/SRC | M | 10 | 10 | 40 |
| W | 10 | 10 | ||
| Moderate-severe TBI | M | 5 | 5 | 20 |
| W | 5 | 5 | ||
| Significant others | M | 5 | 5 | 20 |
| W | 5 | 5 | ||
| Clinicians treating patients at different stages after the injury | M | 5 | 5 | 20 |
| W | 5 | 5 | ||
| Total | 50 | 50 | 100 | |
M, men; mTBI, mild traumatic brain injury; SRC, sport-related concussion; TBI, traumatic brain injury; W, women.