Table 1:

Flow variables used to characterize different aspects of the hemodynamic environment of ruptured and unruptured PCOM aneurysms^{^a}

Variable	Unruptured	Ruptured	P
Wall shear stress distribution characteristics
WSSmin, dyne/cm²	0.64 ± 1.39	0.29 ± 0.74	.002^{^b}
WSSmean, dyne/cm²	22.34 ± 20.16	24.17 ± 23.21	.59
WSSnorm	0.51 ± 0.33	0.43 ± 0.28	.02^{^b}
WSSmax, dyne/cm²	231.54 ± 172.1	341.30 ± 299.9	<.001^{^b}
MWSSnorm	5.71 ± 5.05	6.10 ± 3.18	<.001^{^b}
OSImax	0.261 ± 0.137	0.336 ± 0.102	<.001^{^b}
OSImean	0.013 ± 0.014	0.017 ± 0.015	<.001^{^b}
SCI	5.76 ± 8.50	7.04 ± 7.17	<.001^{^b}
LSA	52.32 ± 31.91	59.63 ± 30.46	.05
Aneurysm inflow characteristics
Q, cm³/s	0.71 ± 0.85	0.88 ± 0.99	.01^{^b}
ICI	0.649 ± 0.785	0.782 ± 0.674	.02^{^b}
Intra-aneurysmal flow characteristics
Vmax, cm/s	67.89 ± 33.84	95.73 ± 59.21	<.001^{^b}
VE, cm/s	9.75 ± 7.39	10.71 ± 7.67	.18
VO, 1/s	320.47 ± 274.3	323.66 ± 254.7	.57
SR, 1/s	236.26 ± 201.9	235.06 ± 182.4	.67
CORELEN, cm	1.837 ± 2.484	3.133 ± 2.982	<.001^{^b}
PODENT	0.179 ± 0.140	0.206 ± 0.117	<.001^{^b}

Note:—CORELEN indicates vortex core length - flow complexity; ICI, inflow concentration index; LSA, low shear area (% of aneurysm sac); MWSSnorm, maximum normalized WSS; OSImax, maximum oscillatory shear index; OSImean, mean oscillatory shear index; PODENT, proper orthogonal decomposition entropy—flow stability; Q, aneurysm inflow rate; SCI, shear concentration index; SR, mean aneurysm shear rate; VE, mean aneurysm velocity; Vmax, maximum aneurysm velocity; VO, mean aneurysm vorticity; WSSmax, maximum WSS; WSSmean, average WSS; WSSmin, minimum WSS; WSSnorm, normalized WSS.
↵a Values given are mean ± standard deviation, and P values correspond to the Mann-Whitney U test.
↵b Statistically significant association.