Table 4:

Small-aneurysm Roy score distribution for initial result and subsequent follow-up angiograms

Initial Roy Grade	No. Aneurysms with Initial Result (%)	Class 1 on Follow-Up (%)	Class 2 on Follow-Up (%)	Class 3 on Follow-Up (%)	Recurrence (%)
Class 1: complete occlusion	45 (57.0)	35 (77.8)	7 (15.6)	3 (6.7)	10 (22.2)
Class 2: residual neck	25 (31.6)	14 (56.0)	9 (36.0)	2 (8.0)	2 (8.0)
Class 3: residual aneurysm	9 (11.4)	4 (44.4)*	3 (33.3)	2 (22.2)	2 (22.2)
Total	79 (100)	53 (67.1)	19 (24.1)	7 (75.9)	14 (17.7)

^*One of these 4 patients had parent-vessel occlusion on the follow-up angiogram, which was graded as Roy class 1.