Table 2

System characteristics

Characteristic	Emergency Medical System
	Basic	Advanced	p Value
Overall	n=101	n=251
Transport platform, n (%) transferred by air	0 (0)	30 (12)
ALS provider on scene, n (%)	0 (0)	232 (92)
Time intervals (min), median (IQR)
Response interval	n=97	n=234
	8 (5–14)	9 (6–14)	1.00
On scene interval*	n=95	n=233
	18 (12–24)	23 (16–34)	0.002
Total prehospital interval	n=97	n=212
	52 (39–68)	51 (37–71.3)	0.85
Prehospital interventions, n (%)	n=97	n=251
Airway intervention*	4 (4)	38 (15)	0.003
Intravenous line insertions*	31 (32)	195 (78)	<0.001
Oxygen administration	71 (73)	165 (66)	0.20
Moderate injury	n=68	n=171
Transport platform, n (%) transferred by air	0 (0)	16 (9)
ALS provider on scene, n (%)	0 (0)	156 (91)
Time intervals (min), median (IQR)
Response interval	n=66	n=163
	8 (5–14.8)	9 (5.5–14)	0.44
On scene interval*	n=64	n=163
	21 (15–26)	23 (15–34)	0.009
Total prehospital interval	n=66	n=152
	63 (52.3–82.3)	52 (38–71.3)	0.87
Prehospital interventions, n (%)	n=66	n=171
Airway intervention†	1 (2)	15 (9)	0.047
Intravenous line insertions*	19 (29)	133 (78)	<0.001
Oxygen administration	48 (73)	101 (59)	0.053
Severe injury	n=33	n=80
Transport platform, n (%) transferred by air	0 (0)	13 (16)
ALS provider on scene, n (%)	0 (0)	76 (95)
Time intervals (min), median (IQR)
Response interval	n=31	n=71
	8 (5–10)	10 (7–14)	0.10
On scene interval	n=31	n=60
	16 (12.5–24.5)	22.5 (16–32.8)	0.11
Total prehospital interval	n=31	n=66
	75 (66.5–85.5)	51 (36.8–70.5)	0.56
Prehospital interventions, n (%)	n=31	n=80
Airway intervention†	3 (10)	23 (29)	0.044
Intravenous line insertions*	12 (39)	62 (78)	<0.001
Oxygen administration	23 (74)	64 (80)	0.61

Some analyses were completed with fewer observations than the total n for each system due to missing data (this is indicated by n values in columns 2 and 3).
*Indicates strong significance (p<0.01).
†Indicates moderate significance (0.01<p<0.05).
ALS, Advanced Life Support.