Influence of Environmental Factors on Injury Severity Using Ordered Logit Regression Model in Limpopo Province, South Africa

Table 4

The model goodness of fit using Brant test.

Variable	Response	Chi-square	Degree of freedom	value
Environmental condition	Deposit on road	2.81	2	0.2448
	Poor or defective road surface	0.48	2	0.7853
	Potholes	0.40	2	0.8169
	Rain	1.76	2	0.4153
	Slippery road	0.07	2	0.9633
	Stationary or parked vehicle	13.82	2	0.0010
Hour interval	06–13 hours	2.87	2	0.2383
	14–23 hours	3.26	2	0.1964
Season	Spring	2.24	2	0.3263
	Summer	1.23	2	0.5410
	Winter	7.88	2	0.0194
Road type	National	1.35	2	0.5102
	Others	3.82	2	0.1483
	Provincial	3.66	2	0.1600
	Regional	1.05	2	0.5904
Regional distribution	Mopani district	1.03	2	0.5972
	Sekhukhune district	9.00	2	0.0111
	Vhembe district	10.56	2	0.0051
	Waterberg district	3.74	2	0.1540
Overall		74.04	38	0.0004

value: significant at 0.05.