Table 3:

Relationship between follow-up duration and follow-up outcomes

Duration (mo)	n	Unchanged	Reopening	Progressive Thrombosis
<3	76	55	13 (6)	8
3–6	97	87	6 (6)	4
>6 to <12*	173	169	4	0
12–24†	34	32	2	0
>24 to 36†	16	14	2	0
36–54†	6	6	0	0

Note:—Values in parentheses indicate reembolization with Guglielmi detachable coils.

^*Second follow-up angiography.

^†Third follow-up angiography.