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Table 5: Factors associated with rupture after coil embolization in untreated recanalized aneurysms in the unruptured group^{^a}
Untreated Recanalized Aneurysms (n = 20)
Unruptured (n = 16) Ruptured (n = 4) P Value
Age (yr) 67.0 (60.3–72.8) 63.0 (55.8–70.3) .570
Sex
 Male 1 (6.3%) 1 (25.0%) .264
 Female 15 (93.7%) 3 (75.0%) 
Location
 ICA 5 (31.2%) 1 (25.0%) .937
 ICA-PcomA 4 (25.0%) 1 (25.0%) 
 AcomA 1 (6.3%) 0 (0.0%) 
 Posterior 6 (37.5%) 2 (50.0%) 
Dome 9.2 (7.6–13.4) 9.9 (6.6–11.1) .813
Neck 5.5 (4.4–7.0) 4.5 (3.2–8.8) .741
VER 22.1 (13.9–26.1) 25.1 (18.5–37.3) .321
Use of stent
 No 9 (56.3%) 2 (50.0%) .822
 Yes 7 (43.7%) 2 (50.0%) 
Type of recanalization on final DSA
 II + IIIa 10 (62.5%) 0 (0.0%) .025^{^b}
 IIIb 6 (37.5%) 4 (100.0%) 
Aneurysm growth
 No 13 (81.3%) 3 (75.0%) .780
 Yes 3 (18.7%) 1 (25.0%) 
Note:—ICA indicates ICA other than ICA-PcomA; VA, vertebral artery; BA, basilar artery; SCA, superior cerebellar artery; VER, volume embolization ratio; Posterior, posterior circulation including the VA, BA-SCA, and BA-bifurcation.
↵a Data are recanalized aneurysms in the unruptured group (n = 38): Twenty of 38 recanalized aneurysms were untreated. Among 20 untreated recanalized aneurysms, 16 aneurysms unruptured and 4 aneurysms ruptured.
↵b Statistical significance.