Table 1.

Comparison of morphologic and hemodynamic features of ruptured and unruptured small and large IAs.

	Small IAs (≤5mm)			Large IAs (>5mm)
	Unruptured n=206 Mean±SD	Ruptured n=63 Mean±SD	p-value	Unruptured n=105 Mean±SD	Ruptured n=39 Mean±SD	p-value
Patient Feature
Age(yrs)	59±29	59±16	0.595	62±26	57±11	0.039
Morphologic Features
Size(mm)	3.11±1.70	3.29±1.22	0.256	8.10±4.79	7.54±2.06	0.682
Neck(mm)	3.64±1.20	4.49±7.72	0.369	5.39±2.23	4.61±1.30	0.078
SR	1.35±0.86	2.02±0.99	<0.001	3.13±2.38	3.88±1.57	0.001
AR	0.90±0.50	1.00±0.44	0.069	1.63±0.93	1.72±0.50	0.166
UI	0.06±0.06	0.09±0.07	0.001	0.07±0.06	0.11±0.06	0.001
EI	0.10±0.06	0.13±0.06	0.001	0.17±0.08	0.19±0.043	0.006
NSI	0.12±0.07	0.16±0.08	<0.001	0.19±0.10	0.23±0.057	0.003
An	0.84±0.49	1.24±0.660	<0.001	1.07±0.52	1.19±0.53	0.171
Hemodynamic Features
WSS	0.69±0.51	0.54±0.42	0.014	0.49±0.35	0.32±0.25	0.003
OSI	0.004±0.007	0.017±0.034	<0.001	0.007±0.011	0.016±0.026	0.001
WSSG	−49±162	−27±215	0.547	−68±312	−40±57	0.539
RRT	2.44±2.83	5.04±6.99	0.006	4.53±5.72	7.03±8.37	0.003
LSA	0.10±0.17	0.27±0.32	<0.001	0.23±0.27	0.39±0.30	0.001
MWSS	3.97±2.48	4.09±3.24	0.286	4.88±3.89	3.73±2.82	0.019
PLc	6.07±16.82	5.82±12.45	0.847	4.05±3.95	6.74±9.94	0.112
EL(W/m3)	7607±12065	18543±38272	0.062	4446±8564	10813±24876	0.154

An=aneurysm number; AR=aspect ratio; EI=ellipticity index; EL=energy loss; LSA=low wall shear stress area; MWSS=maximum wall shear stress; NSI=nonsphericity index; OSI=oscillatory shear index; PLc=pressure loss coefficient; RRT=relative residence time; SR=size ratio; UI=undulation index; WSS=wall shear stress; WSSG=wall shear stress gradient