The effect of the development of an emergency transfer system on the travel time to tertiary care centres in Japan

Table 8 Stepwise selection

	R ²	Adjusted R²	C(p)	F value	Pr>F
Average coverage area per tertiary care centre	0.5667	0.5667	22.3181	57.54	<0.0001
Kilometres of highway road per square kilometre	0.1054	0.6721	8.6749	13.82	0.0006
Population	0.0480	0.7201	3.5429	7.21	0.0103

ISSN: 1476-072X