A Comprehensive Analysis for the Heterogeneous Effects on Driver Injury Severity in Single-Vehicle Passenger Car and SUV Rollover Crashes

Table 5

Estimated marginal effects of safety factors in mixed ordered logit models (%).

Variables	Passenger car				SUV
	NI	PI	NII	SI	NI	PI	NII	SI
Male	19.07	−4.49	−13.05	−1.53	26.91	−5.10	−19.63	−2.18
Age	−0.57	0.16	0.36	0.04
Safety belt use	23.62	−0.27	−20.34	−3.01	31.48	4.35	−30.55	−5.28
Airbag deployment	−24.66	5.17	17.36	2.12	−9.54	1.89	6.92	0.73
Ejection or partial ejection	−44.15	−29.49	29.59	44.05	−45.43	−26.84	30.73	41.54
Drug or alcohol use	−20.47	0.38	17.55	2.54	−13.69	1.34	11.05	1.30
Failure to drive in single lane	−9.28	1.97	6.55	0.77	−15.57	1.82	12.48	1.45
Improper evasive action					−8.14	1.62	5.90	0.62
Turning right	40.44	−22.15	−16.79	−1.50
Model year	0.41	−0.12	−0.27	−0.03	1.28	−0.32	−0.88	−0.09
Intersection					−9.41	2.33	6.44	0.64
Speed limit	−0.50	0.14	0.32	0.04	−0.67	0.17	0.46	0.05
Friday					16.27	−5.63	−9.75	−0.89
August	−10.13	1.82	7.41	0.90
Adverse weather	16.89	−6.70	−9.26	−0.93	16.85	−5.80	−10.12	−0.93
Night with light	12.34	−4.54	−7.08	−0.73
Rural area	11.65	−2.74	−7.99	−0.92	9.87	−1.99	−7.13	−0.75

NI: No injury, PI: Possible injury, NII: Nonincapacitating injury, SI: Serious injury.