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Table 1: Morphologic and hemodynamic variables for the ruptured and unruptured aneurysms*
Ruptured (n = 8) Unruptured (n = 18) P Value
Age (yr) 60 ± 17 55 ± 12 .31
Artery size (mm) 4.7 ± 0.7 4.7 ± 0.4 .60
Aneurysm size (mm) 11.0 ± 6.9 6.9 ± 3.3 .09
Ostium size (mm) 4.1 ± 1.1 4.1 ± 1.2 .60
Aspect ratio 2.0 ± 0.9 1.5 ± 0.8 .19
Area at aneurysm (mm²) 256 ± 351 124 ± 110 .37
Ostium area (mm²) 18 ± 8 19 ± 11 .85
Mean shear at artery (N/m²) 4.0 ± 1.8 4.5 ± 2.1 .57
Mean shear at aneurysm (N/m²) 1.9 ± 1.1 2.6 ± 1.9 .50
Mean shear at ostium (N/m²) 5.7 ± 4.3 5.5 ± 3.2 .99
Aneurysm shear/arterial shear (%) 48 ± 33 59 ± 33 .26
Maximal wall shear (N/m²) 26 ± 15 23 ± 12 .80
Low wall shear area (mm²) 128 ± 290 22 ± 44 .04
Ratio of low shear area (%) (low shear area/dome area) 27 ± 25 11 ± 17 .03
* Numbers are presented as mean ± SD. The Mann-Whitney rank sum test is used for statistical analysis. A P value < .05 is deemed statistically significant.