Table 4:

Complication by aneurysm size

Major Complications	Small		Large		Giant		P Value	Total
Major Complications	Anterior	Posterior	Anterior	Posterior	Anterior	Posterior	P Value	Total
Aneurysm size (mm)							<.0001
Mean ± SD (n)	5.3 ± 2.2 (360)	6.1 ± 2.5 (27)	14.8 ± 4.1 (292)	14.8 ± 4.1 (46)	29.2 ± 5.6 (49)	28.5 ± 6.2 (14)		11.3 ± 7.7 (788)
Median, range	5.0, 1.0–10.0	6.3, 1.5–9.4	14.0, 10.0–24.5	14.3, 10.0–23.0	27.0, 25.0–55.0	26.0, 25.0–45.0		10.0, 1.0–55.0
Spontaneous rupture	0.0% (0/360)	0.0% (0/27)	0.7% (2/292)	0.0% (0/46)	4.1% (2/49)	7.1% (1/14)	.0011	0.6% (5/793)
Intracranial hemorrhage	1.9% (7/360)	0.0% (0/27)	2.7% (8/292)	2.2% (1/46)	6.1% (3/49)	7.1% (1/14)	.0901	2.5% (20/793)
Ischemic stroke	2.8% (10/360)	0.0% (0/27)	4.8% (14/292)	4.3% (2/46)	12.2% (6/49)	21.4% (3/14)	.0008	4.5% (36/793)
Parent artery stenosis	0.3% (1/360)	0.0% (0/27)	0.3% (1/292)	0.0% (0/46)	0.0% (0/49)	0.0% (0/14)	1.0000	0.3% (2/793)
Cranial neuropathy	0.0% (0/360)	0.0% (0/27)	0.7% (2/292)	0.0% (0/46)	0.0% (0/49)	0.0% (0/14)	.3373	0.3% (2/793)
Neurologic morbidity	5.0% (18/360)	0.0% (0/27)	7.5% (22/292)	6.5% (3/46)	22.4% (11/49)	28.6% (4/14)	<.0001	7.4% (59/793)
Neurologic mortality	1.7% (6/360)	3.7% (1/27)	4.8% (14/292)	6.5% (3/46)	6.1% (3/49)	21.4% (3/14)	.0033	3.8% (30/793)
Neurologic morbidity and mortality (all patients)	5.3% (19/360)	3.7% (1/27)	8.6% (25/292)	10.9% (5/46)	22.4% (11/49)	35.7% (5/14)	<.0001	8.4% (67/793)
Neurologic morbidity and mortality (patients with unruptured aneurysms)	3.5% (11/311)	0.0% (0/24)	7.9% (22/277)	11.4% (5/44)	22.9% (11/48)	30.8% (4/13)	<.0001	7.5% (54/720)
Neurologic morbidity and mortality (patients with ruptured aneurysms)	16.0% (8/50)	33.3% (1/3)	18.8% (3/16)	0.0% (0/2)	50.0% (1/2)	100.0% (1/1)	.1385	18.4% (14/76)
Neurologic morbidity and mortality (excluding ruptured, dissecting, or fusiform aneurysms)	3.8% (11/293)	0.0% (0/12)	6.4% (14/218)	11.8% (2/17)	20.5% (8/39)	20.0% (1/5)	.0005	6.2% (36/585)