Objective: Motor vehicle collisions (MVCs) are a leading cause of death and acute disability among young adults worldwide. We performed a prospective study of young drivers involved in severe MVCs, investigating the critical events leading up to a collision with an emphasis on driver-related factors and collision culpability.Methods: A study was conducted in southeastern Norway of all drivers younger than 25 years who were involved in high-energy MVCs resulting in immediate hospitalization during 2013-2016. Collision investigators evaluated the exterior and interior of the motor vehicle (MV) within 24 h. Complementary information was obtained from interviews of collision victims, ambulance personnel and witnesses, from police reports, and medical records.Results: There were 145 young drivers included during a 3-year study period, representing an estimated incidence of 29 per 100,000 drivers with registered driving licenses. Ninety-two percent (133/145) were considered culpable of initiating the MVC, and only 2% of the critical factors preceding the collision were not related to the driver. There were 74% (108/145) males, the median MV age was 14 years, and 86% (125/145) of the MVs were passenger cars. The MVCs predominantly occurred on rural roads (90%, 130/145). Among the culpable drivers, speeding behavior was the main predisposing factor in 80% (106/133) of the collisions. Driving at excessive speed was associated with single-vehicle collisions (87%, 74/85) and the presence of passengers (89%, 56/63). Compared to nonculpable drivers, culpable drivers were more often younger than 21 years (66% vs 33%, p = 0.031), had obtained their license less than 2 years previously (68% vs 20%, p = 0.004), and were more likely to have been drinking or using drugs (27% vs 0%, p = 0.039). The overall rate of seatbelt use was 79% (114/145). Conclusion:The vast majority of injury-causing MVCs involving young drivers are initiated by those drivers. These incidents are characterized by male drivers with little driving experience who are operating old cars on rural roads at excessive speeds. Driving under the influence of alcohol or drugs is also not uncommon. These issues should be targeted in future preventive measures.
Driver fatalities in motor vehicle collisions (MVCs) encompass accidents, suicides, and natural deaths when driving. The objective of this study was to determine the significance of pathology and other autopsy findings for drivers in fatal MVCs. Forensic autopsy records of driver fatalities in southeast Norway between 2000 and 2014 were studied retrospectively. Data from individual police and collision investigation reports were also collected and analyzed. In 406 driver fatalities, the male/female ratio was 340/66; 9% died from natural causes, 9% were suicides, 65% were culpable accidental deaths, 14% were nonculpable deaths, and 3% were undetermined deaths. Head injuries and thoracic injuries were the most common causes of death. A seatbelt had been worn in 50% of the fatalities, and its prevalence did not differ between accidental deaths and suicides. Blood levels of alcohol and/or drugs that indicated impairment at the time of the collision were found in 40% (105/262) of all culpable accidental deaths but in 50% (64/127) of drivers aged up to 35 years. Pathology (most often cardiovascular disease) suggestive of sudden incapacitation before the collision was present in 24% (62/264) of drivers who were culpable in the accident and in 70% (46/66) of culpable drivers older than 55 years. A substantial proportion of drivers are killed in accidental collisions that may have occurred as a result of either alcohol/drug impairment or preexisting disease. Suicides and natural deaths both constitute significant proportions of MVC fatalities and may be misclassified unless a full inquest including an autopsy is performed.
We performed a retrospective study of the injuries and characteristics of occupant fatalities in motor vehicle collisions in southeast Norway. The goal was to provide updated knowledge of injuries sustained in modern vehicles and detect possible differences in injury pattern between drivers and passengers. Forensic autopsy reports, police, and collision investigation reports from 2000 to 2014 were studied, data extracted and analyzed.A total of 284 drivers, 80 front-seat passengers, and 37 rear-seat passengers were included, of which 67.3% died in front collisions, 13.7% in near-side impacts, 13.5% in rollovers and 5.5% in other/combined collisions. Overall, 80.5% died within one hour after the crash. The presence of fatal injuries to the head, neck, thorax and abdomen were observed in 63.6%, 10.7%, 61.6% and 27.4% respectively. All occupants with severe injuries to the head or neck had signs of direct impact with contact point injuries to the skin or skull. Injuries to the heart and spleen were less common in front-seat passengers compared to drivers. Seat belt abrasions were more common and lower extremity fractures less common in both front-seat and rear-seat passengers compared to drivers. Blood alcohol and/or drug concentrations suggestive of impairment were present in 30% of all occupants, with alcohol more often detected among front-seat passengers compared to drivers.Few driver-specific and passenger-specific patterns of injury could be identified. When attempting to assess an occupant’s seating position within a vehicle, autopsy findings should be interpreted with caution and only in conjunction with documentation from the crash scene.
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