Variables | Head injuries (% or Mean ± sd) | p-value | |
---|---|---|---|
Yes (n = 242) | No (n = 484) | ||
Medical history | Â | Â | 0.003 |
 Yes | 11.2 | 19.8 |  |
 No | 88.8 | 80.2 |  |
History of traffic crashes | Â | Â | 0.327 |
 Yes | 39.3 | 35.3 |  |
 No | 60.7 | 64.7 |  |
Sleeping pill consumption | Â | Â | 1.000 |
 Yes | 2.9 | 2.9 |  |
 No | 97.1 | 97.1 |  |
Consumption of stimulants/doping substances | Â | Â | 0.657 |
 Yes | 5.4 | 6.2 |  |
 No | 94.6 | 93.8 |  |
Consumption of alcoholic beverages | Â | Â | 0.503 |
 Yes | 65.3 | 67.8 |  |
 No | 34.7 | 32.2 |  |
Tobacco consumption | Â | Â | 0.623 |
 Yes | 10.7 | 12.0 |  |
 No | 89.3 | 88.0 |  |
 Motorcycle riding experience (years) | 15.7 (10.3) | 16.8 (10.2) | 0.177 |