| Variable | All (n = 278)* | No headgear (n = 216) | Headgear (n = 52) |
| Age at time of survey | 15.0 (1.3) | 14.9 (1.3) | 15.5 (1.1) |
| Male | 64.7% (180/278) | 72.7% (157/216) | 26.9% (14/52) |
| Age started football | 6.2 (2.3) | 6.2 (2.3) | 6.2 (2.12) |
| Years playing organized football | 6.1 (3.2) | 5.9 (3.1) | 7.2 (3.0) |
| Years playing competitive/elite football | 4.4 (2.7) | 4.3 (2.8) | 4.6 (2.5) |
| Minimum number of games played in spring/summer 2006 | 18.0 (5.9) | 18.6 (5.3) | 15.5 (7.7) |
| Consider themselves a “header” | 49.3% (137/278) | 51.4% (111/216) | 44.2% (23/52) |
| Average number of headings per game | 4.6 (3.3) | 4.7 (3.4) | 4.4 (3.2) |
| Experienced a past recognised concussion | 17.3% (48/278) | 11.1% (24/216) | 42.3% (22/52) |
| Experienced 2 or more past recognized concussions | 9.4% (26/278) | 4.6% (10/216) | 26.9% (14/52) |
| Wear a mouthguard | 3.6% (10/278) | 1.4% (3/216) | 13.5% (7/52) |
Mean (SD) and percentages are given where appropriate.
*10 athletes could not reliably be classified as wearing or not wearing headgear.