Table 2.

Factors influencing crash severity (i.e., none vs. minor vs. severe vs. fatal) for single-vehicle crashes. Model derived from 323,581 single-vehicle crash events (not including commercial vehicles and motorcycles) that occurred in Florida (United States) from 2006–2013.

Predictor variableCoefficientStandard errorP-valueOdds ratioLower 95% CIUpper 95% CI
Gender – male−0.45060.0115<0.00010.63730.62310.6518
Age0.01190.0004<0.00011.01201.01131.0127
Drug/Alcohol use – yes−0.10100.0165<0.00010.90390.87520.9336
Vehicle – truck0.06920.0127<0.00011.07161.04541.0986
Vehicle – van0.05850.02730.03201.06021.00501.0986
Land use – urban−0.04810.01280.00020.95300.92940.9772
Road – local−0.18190.0156<0.00010.83370.80870.8596
Road – interstate−0.36310.0168<0.00010.69550.67210.7188
Road surface – loose−0.41750.0916<0.00010.65870.55050.7882
Road surface – water−0.23290.0219<0.00010.79230.75900.8270
Shoulder – paved−0.05360.01960.00620.94780.91210.9849
Shoulder – unpaved0.06550.01760.00021.06771.03151.1051
Light conditions – dark w/lights−0.19880.0149<0.00010.81980.79610.8441
Light conditions – dark−0.07910.0156<0.00010.92400.89610.9527
Light conditions – dawn/dusk−0.07610.02660.00430.92670.87960.9764
Weather – cloudy0.12460.0164<0.00011.13261.09691.1695
Weather – low visibility0.14450.05480.00841.15551.03781.2865
Seatbelt – yes−1.29630.0226<0.00010.27350.26170.2859
Airbag – not deployed−1.11490.0122<0.00010.32790.32020.3359
Ejected – partially2.51540.1134<0.000112.37209.905415.4525
Ejected – yes1.87570.0538<0.00016.52545.87237.2512
Crash type – barrier−0.66190.0191<0.00010.51590.49690.5355
Crash type – ditch−0.14120.0223<0.00010.86830.83120.9070
Crash type – fence−0.57930.0307<0.00010.56030.52760.5950
Crash type – no fixed object−0.48550.0561<0.00010.61540.55140.6869
Crash type – other−0.56220.0278<0.00010.57000.53970.6019
Crash type – parked car−0.94480.27710.00060.38880.22580.6692
Crash type – pole−0.40890.0216<0.00010.66440.63690.6931
Crash type – rollover0.41200.0212<0.00011.50991.44831.5740
Crash type – sign−0.84970.0262<0.00010.42760.40610.4501
Crash type – structure−0.90760.0361<0.00010.40350.37590.4331
Crash type – water−0.45740.0479<0.00010.63290.57620.6952