. 2019 Feb 14;31(2):346–356. doi: 10.1007/s12028-019-00674-y

Table 2.

Characteristics of the study

				Was there delayed postoperative hemorrhage
				No	Yes	p=
Spetzler–Martin	1	Sex	Female	13	0
			Male	12	0
			Total	25	0
		All daily SBP targets achieved	No	10	0
			Yes	15	0
			Total	25	0
	2	Sex	Female	14	0
			Male	22	1
			Total	36	1
		All daily SBP targets achieved	No	20	1
			Yes	16	0
			Total	36	1
	3	Sex	Female	17	0
			Male	17	1
			Total	34	1
		All daily SBP targets achieved	No	20	0
			Yes	14	1
			Total	34	1
	4	Sex	Female	6	0
			Male	10	2
			Total	16	2
		All daily SBP targets achieved	No	8	1
			Yes	8	1
			Total	16	2
	5	Sex	Female	4	0
			Male	1	1
			Total	5	1
		All daily SBP targets achieved	No	1	1
			Yes	4	0
			Total	5	1
	Total	Sex	Female	54	0
			Male	62	5
			Total	116	5	,040^a
		All daily SBP targets achieved	No	59	3
			Yes	57	2
			Total	116	5	,689^a
		Any daily SBP targets achieved	No	5	0
			Yes	111	5
			Total	116	5	,635^a
		Spetzler–Martin		116	5	,043^b
Mean age on admission (years) (SD)				42,26 (18,37)	46,53 (15,32)	,574^c
Was embolization performed before surgical excision	No			77	3
	Yes			36	1
						,772^a
Associated aneurysm, yes/no	No			80	3
	Yes			26	1
	Total			106	4	,983^a
Venous drainage	Cortical			69	0
	Deep			17	1
	Cortical and deep			25	4
	Total			111	5,00	,003^b
Venous drainage	Cortical	Mean AVM size in mm (Angiography or CT largest diameter) (SD)		24 (14)
	Deep	Mean AVM size in mm (Angiography or CT largest diameter) (SD)		18 (10)	16 (–)
	Cortical and deep	Mean AVM size in mm (Angiography or CT largest diameter) (SD)		40 (21)	52 (25)
Outcome at 2–4 mos (1. follow-up); GOS	Good recovery			53	1
	Moderate disability			29	1
	Severe disability			19	3
	Vegetative state			0	0
	Dead			6	0
	Not known			9	0
	Total			116	5	,278^b

AVM arteriovenous malformation, CT computed tomography, GOS Glasgow Outcome Scale, SBP systolic blood pressure, SD standard deviation

^aPearson Chi-square

^bIndependent samples Mann–Whitney U test

^cWelch’s t test