Division, playing position, and age distribution of the cohort at the beginning of the study
| Division | No (%) | Playing position | No (%) | Age distribution | No (%) |
|---|---|---|---|---|---|
| *Percentage totals may be subject to rounding errors associated with individual components. | |||||
| Premier | 618 (26) | Goalkeeper | 223 (9) | 17–22 | 970 (41) |
| 1st | 712 (30) | Defender | 817 (34) | 23–28 | 817 (34) |
| 2nd | 550 (23) | Midfielder | 739 (31) | 29–34 | 508 (21) |
| 3rd | 496 (21) | Forward | 597 (25) | 35+ | 81 (3) |
| Total* | 2376 (100) | 2376 (99) | 2376 (99) | ||