Coding of Explanatory Variables

Potential explanatory variables considered in this analysis fall into the following general categories  

In both GIDAS and PCDS, additional variables were computed from existing ones squared impact speed of the vehicle (to account for possible non-linearities between impact speed and injury severity), kinetic energy of the vehicle, and body mass index (BMI) of the pedestrian. Ratios between anthropometric values and vehicle dimensions were also constructed. Since only basic vehicle profile characteristics were coded in GIDAS, additional data sources were used to reconstruct some of these characteristics for the purpose of analysis (see Sect. 5.2.4). The notation GIDAS and PCDS used for labeling the variables refers to the original data set. 

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