Nomenclature

Pn

Probability of death for pedestrian n

Xn

Independent variable for pedestrian n

β

Corresponding efficient for variable Xn

K

Number of independent variables

M

Number of variables and interaction effects

HL

Hosmer-Lemeshow statistic

O

Observed accidents of a fatal outcome

E

Expected accidents of a fatal outcome

N

Number of observations

θi

Predicted risk for the ith risk decile group