Table 1

Patient characteristics with ruptured and unruptured aneurysms and their angiographic findings

FactorsAneurysm groupsp Value
UnrupturedRuptured
Demographic data
 Patients No123167
 Age (yr, mean (SD))57.9 (10.1)53.5 (13.1)0.854
 Gender
Men43 (35.0%)57 (34.1%)0.645
Women80 (65.0%)110 (65.9%)
 Hypertension
63 (51.2%)59 (35.3%)0.009
60 (48.8%)108 (64.7%)
 Family history
32 (26.0%)10 (6.0%)<0.001
91 (74.0%)157 (94.0%)
 Smoking
33 (26.8%)38 (22.8%)0.662
90 (73.2%)129 (77.2%)
Angiographic data
 No of aneurysm123167
 Location
ACoA26 (18.8%)71 (42.6%)<0.001
ACA8 (5.8%)6 (3.6%)0.471
PCoA17 (12.3%)28 (16.8%)0.331
ICA29 (21.0%)24 (14.4%)0.132
MCA41 (29.7%)34 (20.4%)0.063
V-B15 (10.9%)3 (1.8%)0.001
PCA2 (1.5%)1 (0.6%)0.591
 Size (mm)
Nmax3.8 (2.0)2.9 (1.2)0.000
Dmax5.9 (3.4)5.4 (3.7)0.312
Depth5.9 (3.2)6.6 (4.4)0.114
Bottleneck factor1.6 (0.9)1.9 (0.7)0.024
Aspect ratio1.7 (1.0)2.3 (1.0)<0.001
 Shape
Saccular
 Lobulated23 (16.7%)45 (27.0%)0.038
 Beehive13 (9.4%)29 (17.4%)0.047
 Spherical49 (35.5%)35 (21.0%)0.007
 Ellipse12 (8.7%)40 (23.4%)<0.001
 Pear26 (18.8%)18 (10.8%)0.051
Fusiform15 (10.9%)0<0.001
  • ACA, anterior cerebral artery; ACoA, anterior communicating artery; Aspect ratio, Depth/Nmax; Bottleneck factor, Dmax/Nmax; Dmax, maximum diameter of aneurysmal dome; ICA, distal internal carotid artery except PCoA; MCA, middle cerebral artery; Nmax, maximum diameter of aneurysmal neck; PCA, posterior cerebral artery; PCoA, posterior communicating artery; V-B, vertebrobasilar artery.