Table 4.

Multivariable logistic regression of potential factors associated with emergency neurosurgical procedures, placement of ICP-monitor and evacuation of mass lesion

Variable	Emergency neurosurgerya		ICP-monitor		Evacuation mass lesion
	OR (95% CI)	p-value	OR (95% CI)	p-value	OR (95% CI)	p-value
Age
0–14 years	1		1		1
15–29 years	1.15 (.68, 1.96)	.60	1.43 (.79, 2.60)	.24	.62 (.30, 1.28)	.20
30–44 years	1.06 (.61, 1.83)	.84	1.17 (.63, 2.17)	.63	.81 (.40, 1.63)	.55
45–59 years	1.29 (.77, 2.17)	.33	2.10 (1.16. 3.77)	.01	.54 (.27, 1.08)	.08
60–74 years	1.10 (.65, 1.87)	.72	1.44 (.79, 2.62)	.23	.52 (.26, 1.04)	.07
75–89 years	.41 (.22, .77)	.00	.38 (.18, .78)	.01	.23 (.10, .52)	<.001
90+ years	.10 (.02, .43)	.01	.05 (.01, .47)	.01	.14 (.03, .60)	.01
Sex
Female	1		1		1
Male	1.49 (1.13, 1.97)	.01	1.48 (1.05, 1.94)	.02	1.86 (1.28, 2.70)	.00
ASA-score
1–2	1		1		1
3–4	.92 (.66, 1.29)	.63	.76 (.52, 1.09)	.14	1.33 (.88, 2.01)	.18
Antithrombotic
None	1		1		1
Plate inhibitor	1.02 (.64, 1.60)	.95	1.48 (.90, 2.43)	.13	.72 (.39, 1.31)	.28
Anticoagulation	.75 (.43, 1.31)	.32	.88 (.48, 1.62)	.69	.63 (.34, 1.18)	.15
Combination	2.20 (1.06, 4.54)	.03	1.57 (.64, 3.89)	.33	1.57 (.66, 3.71)	.31
Trauma type
Fall	1		1		1
RTA	1.76 (1.29, 2.40)	<.001	1.97 (1.40, 2.77)	<.001	1.10 (.71, 1.70)	.67
Other	1.16 (.84, 1.60)	.37	1.15 (.81, 1.63)	.43	.92 (.61, 1.40)	.70
GCS
13–15	1		1		1
9–12	4.40 (3.19. 6.05)	<.001	7.17 (4.89, 10.51)	<.001	2.21 (1.44, 3.41)	<.001
3–8	12.47 (9.27, 16.77)	<.001	29.12 (20.34, 41.69)	<.001	1.27 (.83, 1.95)	.27
Midline shift
No (≤5 mm)	1		1		1
Yes (> 5 mm)	3.69 (2.58, 5.29)	<.001	1.50 (1.01, 2.23)	.05	19.23 (12.88, 28.70)	<.001
Basal cisterns
Normal	1		1		1
Compressed/absent	1.75 (1.23, 2.50)	.00	1.20 (1.36, 2.92)	<.001	2.52 (1.63, 3.88)	<.001

OR odds ratio, CI confidence interval

^aPatient undergoing one or more of the following procedures (redo surgeries are not included): ICP-monitor, evacuation of mass lesion, decompressive craniectomy, external ventricular drain