TABLE 2.

Characterization by Spetzler-Martin surgical risk grade of genotyped cases included in each treatment cohort (n = 207)^a

	Spetzler-Martin surgical risk score
	Total	I	II	III	IV	V
AVM resection	135	31	49	42	12	1
AVM resection only	38	13	12	11	2	0
Embolization + AVM resection	97	18	37	31	10	1
Radiosurgery	52	2	7	19	21	3
Radiosurgery only	38	1	5	16	14	2
Embolization + radiosurgery	14	1	2	3	7	1
Complex treatment	20	3	3	7	7	0
Embolization only	12	3	3	3	3	0
Radiosurgery + AVM resection	2	0	0	1	1	0
Embolization + radiosurgery + AVM resection	6	0	0	3	3	0
Total	207	36	59	68	40	4

^aAVM, arteriovenous malformation.