Risk of injury for the time periods studied
| 1994–1996 | 2000–2002 | p Value | |
|---|---|---|---|
| Values in parentheses are number injured/number of starters. | |||
| Risk of attending medical centre per car competitor | 3.4% (230/6693) | 2.1% (130/6090) | <0.001 |
| Risk of category C injury per car competitor | 0.1% (9/6693) | 0.03% (2/6090) | <0.05 |
| Risk of attending medical centre per motorcycle competitor | 3.3% (27/818) | 3.9% (62/1575) | NS |
| Risk of category C injury per motorcycle competitor | 0% | 0.2% (3/1575) | NS |