thèse doctorat de l'université bordeaux 2 - ISPED-Enseignement à ...

ResultsCrash burdenA total of 935 RTCs police reports corresponding to our study period were retrievable from13 police stations. These RTCs could be classified into fatal (N=228), injury (N=428), andmateriel-damage only (N=279) crashes. A total of 3 039 persons were involved in thesecrashes; 12.3% died, and 49.2% were injured. Among those who died (N=374), 74.3% diedimmediately as a result of crash impact, 5.6% died after impact on the crash scene, 2.7% diedduring transportation, and 17.4% died in the hospital. Among the injured (N=1 494), 48.6%were declared as seriously injured in the police report. When these figures were compared fortheir completeness to a total of 1 400 RTCs reported in registers of eight police stations, weestimated that these results accounted for 65.4% of all crashes, 62.7% of injury crashes and76.1% of fatal crashes. With an estimated 655 465 vehicle-km travelled daily, the correctedmortality and morbidity estimates were approximately 73 deaths and 240 injuries per 100million vehicle-km travelled (Table 3). Occupants of personal and passenger vehicles wereabout twice as often involved in an injury or fatal crashes than trucks’ occupants. Similarly,the injury and fatality risk was four times higher for occupants of personal and passengervehicles than for trucks’ occupants. Injury severity was higher for vulnerable road users:pedestrians (0.43), cyclist (0.36), and motorcyclist (0.25), as compared to other vehicles’occupants (≤ 0.20) (Figure 6).Table 3 Burden of road traffic crashes and injuries, according to vehicle type onYaoundé-Douala road section (2004-2007)Non fatalFatalCrash risk by vehicleN Rate* RR 95% CI N Rate* RR 95% CI- Truck 86 45 1 53 27 1- Personal vehicle 340 102 2.29 1.81-2.90 142 43 1.55 1.13-2.13- Utilitarian vehicle 85 70 1.56 1.16-2.11 41 34 1.22 0.81-1.84- Passenger vehicle 159 93 2.10 1.61-2.72 84 49 1.80 1.27-2.53Total** 428 69 228 44Injury risk by road user- Passenger- Truck 108 56 1 19 10 1- Personal vehicle 557 167 2.99 2.43-3.67 133 40 4.06 2.51-6.56- Utilitarian vehicle 171 140 2.50 1.97-3.18 22 18 1.83 0.99-3.38- Passenger vehicle 392 230 4.11 3.32-5.09 85 50 5.07 3.08-8.34- Pedestrian 77 † 57 †- Cyclist 7 † 4 †- Two-wheeled motorized vehicle 110 † 36 †- Other or unspecified 72 † 18 †Total‡ 1494 240 374 73* Per 100 million vehicle-km† Denominator not available‡ Corrected for under-reporting as per police registers24