Table 1:

Comparison of patient characteristics

	PR Group (n = 19)	SR Group (n = 198)	P Value
Female	16 (84.2%)	116 (58.6%)	.047^{^a}
Mean age (yr)	53.6 ± 1.5	55.8 ± 1.0	.22
Mean aneurysm size (mm)	4.6 ± 0.5	6.5 ± 0.2	.01^{^a}
Aneurysm location			.15
Anterior cerebral artery	4 (21.1%)	93 (47.0%)
Middle cerebral artery	5 (26.3%)	35 (17.7%)
Internal carotid artery	9 (47.4%)	57 (28.8%)
Posterior circulation	1 (5.2%)	13 (6.5%)
Hunt and Hess scale^{^b}			.82
1	1 (5.3%)	7 (3.5%)
2	13 (68.4%)	123 (62.1%)
3	2 (10.5%)	36 (18.2%)
4	3 (15.8%)	26 (13.1%)
5	0 (0%)	6 (3.1%)
Modified Fisher grade			.03^{^a}
Small volume (grade 1)	14 (73.7%)	89 (45.0%)
Large volume (grades 2–4)	5 (26.3%)	109 (55.0%)

↵a Significant.
↵b Hunt and Hess scale grades were immediately assessed after the patient recovered from the anesthesia in the PR group and at admission in the SR group without adjustment of comorbidity.