Table 2 Distribution of cases and controls according to behavioural factors
Variables | Head injuries (% or Mean ± sd) | p-value | |
|---|---|---|---|
Yes (n = 242) | No (n = 484) | ||
Helmet use | Â | Â | 0.000 |
 Yes | 69.8 | 90.3 |  |
 No | 30.2 | 9.7 |  |
Distracted during the crash | Â | Â | 0.502 |
 Yes | 15.7 | 13.8 |  |
 No | 84.3 | 86.2 |  |
Telephone use during the crash | Â | Â | 0.014 |
 Yes | 3.3 | 0.8 |  |
 No | 96.7 | 99.2 |  |
Fatigue/drowsiness during the crash | Â | Â | 0.004 |
 Yes | 16.5 | 9.3 |  |
 No | 83.5 | 90.7 |  |