From: Prehospital response model and time to CT scan in blunt trauma patients; an exploratory analysis of data from the head injury retrieval trial
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,*¥