TABLE 1.

Patient and AVM characteristics

Characteristic	Embolization	No Embolization	p Value
No. of patients	151	168
Age, yrs			0.739
<20	35 (23)	42 (25)
20–40	52 (34)	51 (30)
>40	64 (42)	75 (45)
Female sex	83 (55)	81 (48)	0.262
Nidus size, cm			0.001
<3	91/146 (62)	124/154 (81)
3–6	52/146 (36)	26/154 (17)
>6	3/146 (2)	4/154 (3)
Eloquent area	65/145 (45)	80/154 (52)	0.247
Venous drainage			0.002
Deep & superficial	46/146 (32)	25/151 (17)
Deep only	18/146 (12)	35/151 (23)
Superficial only	82/146 (56)	91/151 (60)
Spetzler-Martin grade			0.026
I	25/145 (17)	43/152 (28)
II	64/145 (44)	51/152 (34)
III	41/145 (28)	46/152 (30)
IV	15/145 (10)	9/152 (6)
V	0/145 (0)	3/152 (2)
Ruptured prior to treatment	73 (48)	105 (63)	0.013
Diffuse nidus	28/145 (19)	45/153 (29)	0.045
Pre-resection mRS score			0.190
0	25 (17)	26/167 (16)
1	53 (35)	43/167 (26)
2	30 (30)	35/167 (21)
3	21 (14)	20/167 (12)
4	10 (7)	19/167 (11)
5	12 (8)	24/167 (14)
mRS score at last follow-up			0.707
0	38/140 (27)	35/160 (22)
1	62/140 (44)	67/160 (42)
2	25/140 (18)	35/160 (22)
3	7/140 (4)	7/160 (4)
4	6/140 (4)	9/160 (6)
5	1/140 (1)	3/160 (2)
6	1/140 (1)	4/160 (3)

Values are number (%) or number/total not missing (%).