Injury Risk Functions

The VUFO developed an approach to establish injury risk functions based on real road accident data. An injury risk function describes the probability of the occurrence of a certain injury criterion (dependent variable) depending on one or several variables (independent variable) for a certain population.
Examples of injury risk functions for pedestrian-car accidents depend on the relative speed and age
Essential objectives are the identification of injury data, the analysis and evaluation of possible influencing factors and the selection of an appropriate statistical model. Model quality criteria are important values to evaluate the capacity of the model and to explain what is going on within the random sample.

Examples of injury risk functions for pedestrian-car accidents depend on the relative speed and age

Essential objectives are the identification of injury data, the analysis and evaluation of possible influencing factors and the selection of an appropriate statistical model. Model quality criteria are important values to evaluate the capacity of the model and to explain what is going on within the random sample.

Procedures to develop injury risk functions

Empiric data determine the injury risk functions, in general, retrospectively and use the evaluation of future safety systems prospectively. They offer an important possibility to evaluate the consequences of changed (but not prevented) road accidents. Furthermore, injury risk functions (IRFs) are essential elements for the evaluation of vehicle safety systems. They are able to predict the expected severity of the injury depending on one or several collision parameters. They are especially suitable for the evaluation process when warnings of the system or interferences in the system could change the consequences of a real accident.

These injury risk functions are, in general, established for injury criteria such as:

  • Probability to become at least seriously injured;
  • Probability to become fatally injured;
  • Probability to be at least MAIS2+ injured;
  • Probability to be at least MAIS3+ injured.
Examples for injury risk functions and their use for evaluating the system

What do we offer you?

We establish injury risk functions for the severity of injury to:

• Whole person (e.g. official definition of the severity of the injury, MAIS, ISS, etc.);
• Body area (e.g. AISHead);
• Individual injuries (e.g. AIS).

The established procedure has been applied to accidents from GIDAS (German Accident In-Depth Study) so far. Other data sets and other command variables other than the severity of the injury data have, in general, also been provided.
In addition to the establishment of the injury risk functions, we offer a comprehensive analysis and interpretation of the results and their use in regard to the evaluation of active and passive vehicle safety systems.

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Do you have questions about the creation of injury risk functions? We are looking forward to your  inquiry! As contact person Thomas Unger is at your disposal.