Table 6.

Distance to the scene and response time by physician team and vehicle

	GSA HEMS by road, n = 11	GSA HEMS by helicopter, n = 37	HIRT HEMS, all by helicopter, n = 335	P
Nm from base to incident	5 (2–7)	20 (14–28)	11 (7–16)	<0.001,*§ ¥
Response time, minutes	15 (10–19)	22 (19–27)	11 (9–14)	<0.001,*¥

Nm, nautical mile. All values reported as medians (IQR).

*indicates difference between GSA HEMS by road and GSA HEMS by helicopter at <0.05 level.

^§indicates difference between GSA HEMS by road and HIRT HEMS at <0.05 level.

^¥indicates difference between GSA HEMS by helicopter and HIRT HEMS at <0.05 level.