Table 1:

Patients with dural arteriovenous fistulas with and without an occipital artery as one of the feeders^{^a}

	Dural Arteriovenous Fistulas		P Value
	With OA (n = 92 )	Without OA (n = 89 )	P Value
Age (yr) (SD)	54 ± 14	56 ± 16	.19
Male (%)	44 (48)	29 (33)	.04
Location (%)
Cavernous sinus	3 (3)	60 (9)	<.001
Large sinuses^{^b}	60 (65)	9 (10)
Other sinuses^{^b}	29 (32)	20 (23)
Type (%)
I and IIa	34 (37)	53 (60)	<.001
IIb, IIa+b, and III	48 (52)	34 (38)
IV and V	10 (11)	2 (2)
Aggressiveness (%)	36 (39)	21 (24)	.03

↵a Values are numbers (percentages), except age.
↵b Large sinuses include the transverse, sigmoid, and superior sagittal sinuses; other sinuses include all locations other than the cavernous sinus and large sinuses.