Table 3.

Treatment

	TBI + injury		TBI isolated		Total		P value
	n	% mort	n	% mort	n	% mort
Indirect transfer
No	321	29.3	321	32.4	642	30.8	0.44
Yes	43	11.6	82	20.7	125	17.6	0.23
Mode of transport
Air	175	26.3	139	26.6	314	26.4	0.99
Ground	177	29.9	248	33.5	425	32.0	0.46
Unknown	12	0.0	16	6.3	28	3.6	0.99
Prehospital intubation
No	76	21.1	148	22.3	224	21.9	0.87
Yes	288	28.8	255	34.5	543	31.5	0.17
Neurosurgery
No neurosurgery	107	27.1	125	24.8	232	25.9	0.76
ICP monitoring only	167	24.6	105	27.6	272	25.7	0.57
ASDH evacuation	45	33.3	121	39.7	166	38.0	0.48
EDH evacuation	28	25.0	27	29.6	55	27.3	0.77
ICH evacuation	5	40.0	9	11.1	14	21.4	0.51
>1 lesion evacuated	7	42.9	14	14.3	21	23.8	0.28
Primary decompressive surgery	5	40.0	2	100.0	7	57.1	0.43
Total	364	27.2	403	30.0	767	28.7	0.42
Secondary decompressive surgery	6	50.0	5	60.0	11	54.5	0.86
Technique
Decompressive surgery	11	54.5	8	62.5	19	57.9	0.99
Craniectomy	36	27.8	63	28.6	99	28.3	0.99
Craniotomy	43	30.2	102	37.3	145	35.2	0.45
Total	90	30.2	173	37.3	263	28.7	0.94
ICP monitoring
No	124	28.2	177	25.4	301	26.6	0.60
Yes	240	26.7	226	33.6	466	30.0	0.11
Extracranial surgery
No	201	28.9	376	32.2	577	31.0	0.45
Yes	163	25.2	27	0.0	190	21.6	0.002

The P value relates to the mortality difference between patients with isolated TBI and patients with concomitant injuries

TBI traumatic brain injury; ICP intracranial pressure; ASDH acute subdural hematoma; EDH epidural hematoma; ICH intracerebral hemorrhage