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首页> 外文期刊>Traffic Injury Prevention >The Correlation Between Pedestrian Injury Severity in Real-Life Crashes and Euro NCAP Pedestrian Test Results
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The Correlation Between Pedestrian Injury Severity in Real-Life Crashes and Euro NCAP Pedestrian Test Results

机译:现实生活中的行人伤害严重程度与Euro NCAP行人测试结果之间的相关性

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摘要

Objective: The aim of the present study was to estimate the correlation between Euro NCAP pedestrian rating scores and injury outcome in real-life car-to-pedestrian crashes, with special focus on long-term disability. Another aim was to determine whether brake assist (BA) systems affect the injury outcome in real-life car-to-pedestrian crashes and to estimate the combined effects in injury reduction of a high Euro NCAP ranking score and BA. Methods: In the current study, the Euro NCAP pedestrian scoring was compared with the real-life outcome in pedestrian crashes that occurred in Sweden during 2003 to 2010. The real-life crash data were obtained from the data acquisition system Swedish Traffic Accident Data Acquisition (STRADA), which combines police records and hospital admission data. The medical data consisted of International Classification of Diseases (ICD) diagnoses and Abbreviated Injury Scale (AIS) scoring. In all, approximately 500 pedestrians submitted to hospital were included in the study. Each car model was coded according to Euro NCAP pedestrian scores. In addition, the presence or absence of BA was coded for each car involved. Cars were grouped according to their scoring. Injury outcomes were analyzed with AIS and, at the victim level, with permanent medical impairment. This was done by translating the injury scores for each individual to the risk of serious consequences (RSC) at 1, 5, and 10 percent risk of disability level. This indicates the total risk of a medical disability for each victim, given the severity and location of injuries. The mean RSC (mRSC) was then calculated for each car group and t-tests were conducted to falsify the null hypothesis at p ≤0.05 that the mRSC within the groups was equal. Results: The results showed a significant reduction of injury severity for cars with better pedestrian scoring, although cars with a high score could not be studied due to lack of cases. The reduction in RSC for medium-performing cars in comparison with low-performing cars was 17, 26, and 38 percent for 1, 5, and 10 percent of medical impairment, respectively. These results applied to urban areas with speed limits up to 50 km/h, although no significant reduction was found in higher speed zones. Regarding cars with BA, the null hypothesis could not be rejected at p = 0.05; hence, no significant results of injury reduction were found. Conclusions: A significant correlation between Euro NCAP pedestrian score and injury outcome in real-life car-to-pedestrian crashes was found. Injury reduction was found to be higher with increasing severity and level of permanent medical impairment. The difference between 1- and 2-star cars is 17 percent in mean risk of permanent medical impairment (mRSC) 1%+, 26 percent in mRSC 5%+, and 38 percent in mRSC 10%+ for crashes in speed zones up to 50 km/h. Brake assist was not found to provide a statistically significant injury reduction.
机译:目的:本研究的目的是评估欧洲NCAP行人评分分数与现实的人车相撞事故中伤害结果之间的相关性,特别关注长期残疾。另一个目标是确定制动辅助(BA)系统是否影响现实的人车相撞事故中的伤害结果,并评估高Euro NCAP等级评分和BA在减少伤害方面的综合效果。方法:在本研究中,将欧洲NCAP行人评分与2003年至2010年瑞典发生的行人碰撞的真实结果进行了比较。真实的碰撞数据是从数据采集系统瑞典交通事故数据采集中获得的(STRADA),它结合了警察记录和医院入院数据。医学数据包括国际疾病分类(ICD)诊断和缩写伤害量表(AIS)评分。这项研究总共包括了大约500名送往医院的行人。每种汽车型号均根据Euro NCAP行人评分进行编码。此外,对涉及的每辆汽车都编码了BA的存在与否。根据得分将汽车分组。使用AIS分析伤害结果,并在受害人水平上分析永久性医学损伤。这是通过将每个人的伤害评分转换为残障风险水平为5%,10%和10%的严重后果风险(RSC)来完成的。考虑到伤害的严重程度和位置,这表明每位受害者有医疗残疾的总风险。然后计算每个汽车组的平均RSC(mRSC),并进行t检验以证伪假假设,即p≤0.05即各组中的mRSC相等。结果:结果显示行人得分较高的汽车的伤害严重程度显着降低,尽管由于缺乏病例而无法研究高分的汽车。与中型汽车相比,中型汽车的RSC降低了17%,26%和38%,分别占医疗损害的1%,5%和10%。这些结果适用于时速最高为50 km / h的城市地区,尽管在高速地区未发现明显降低。对于具有BA的汽车,在p = 0.05时不能拒绝原假设。因此,没有发现减少伤害的明显结果。结论:在实际的人车相撞事故中,Euro NCAP行人得分与伤害结果之间存在显着相关性。人们发现,随着严重程度和永久医学损伤水平的提高,减少伤害的程度更高。 1星和2星汽车在永久性医疗损害(mRSC)1%+的平均风险中的差异为17%,在mRSC 5%+的平均风险中为26%,在mRSC 10%+的碰撞中,最高为38%。 50公里/小时未发现刹车辅助可以显着减少伤害。

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