Table 4.

Wall shear stress for ruptured and unruptured aneurysms in wide-necked aneurysms

Parameters	Ruptured	Unruptured	P
Mean aneurysm WSS (Pa)
Median	4.04	4.44	0.587
Quartiles	5.24	2.96
Highest aneurysm WSS (Pa)	14.58 ± 10.93	9.95 ± 3.73	0.048
Mean parent artery WSS (Pa)	8.94 ± 6.13	7.73 ± 2.53	0.355
Low shear area ratio (low shear area/dome area)	0.075 ± 0.082	0.026 ± 0.032	0.007
Highest aneurysm-parent WSS ratio	1.616 ± 0.320	1.292 ± 0.176	0.000
Mean aneurysm-parent WSS ratio	0.656 ± 0.247	0.660 ± 0.170	0.954

Normally distributed variables are presented as mean ± SD and were analyzed with the independent-samples t test. Non-normally distributed variables are presented as medians and quartiles and were analyzed using the Mann–Whitney U test. A P value <0.05 was deemed statistically significant

WSS wall shear stress