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汽车安全与节能学报

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Effects of impact speeds and pedestrian ages on lower extremity serious injury risk

WANG Bingyu1, 2, NIE Jin 3*, OTTE Dietmar4, WANG Fang1, 2, HAN Yong 1, 2, PENG Qian1, 2   

  1. (1. School of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen, 361024, China;
    2. Fujian Collaborative Innovation Center for R&D of Coach and Special Vehicle, Xiamen, 361024, China;
    3. Know-How Automotive School, Loudi Professional Technology College, Loudi 417000, China;
    4. Accident Research Unit, Medical University of Hannover, Hannover 30625, Germany)
  • Received:2017-05-08 Online:2018-03-31 Published:2018-04-10

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Abstract:

The lower extremity injury risks of pedestrian in real world accident were investigated. A subsample of 404 cases with pedestrian lower extremity injuries from the German In-Depth Accident Study (GIDAS)  database were used to statistical analysis. Some logistic regression models of the risks for lower extremity
AIS2+ injuries and tibia/fibula fractures were developed by means of vehicle impact speeds and pedestrian ages. The results show that impact speed and age are the two statistically significant predictors for pedestrians sustaining lower extremity AIS2+injuries and tibia/fibula fractures. In the selected sample, the lower extremity AIS2+ injury risk is 50% probability at the impact speed of 47.5 km/h. The tibia/fibula fracture injury risks are 50% at the impact speed of 64.5 km/h. The risk of injury increases with the increasing of age.

Key words: automobile passive safety, pedestrian traffic accident, lower extremity AIS2+ injuries, tibia/fibula fractures, logistic regression model, impact speed, pedestrian age