Table 2:

Index values for growing and stable aneurysms segregated by size^{^a}

	Index
	<3 mm (n = 95)	3–5 mm (n = 160)	5–7 mm (n = 65)	>7 mm (n = 28)	All^{^b} (n = 348)	Initial^{^c} (n = 93)
Maximum diameter
Growing	2.21 ± 0.66	3.93 ± 0.58	6.09 ± 0.58	8.55 ± 1.28	4.64 ± 2.33	3.98 ± 2.09
Stable	2.22 ± 0.55	3.82 ± 0.52	5.77 ± 0.58	8.78 ± 1.52	4.03 ± 1.78	4.14 ± 1.84
Volume
Growing	9.41 ± 8.51	49.2 ± 49.7	151 ± 119	572 ± 287^{^d,^e}	145 ± 235^{^d,^e}	110 ± 197
Stable	12.5 ± 6.88	30.4 ± 20.9	108 ± 68.9	150 ± 261^{^d}	46.7 ± 81.0^{^d}	57.0 ± 106
Surface area
Growing	28.1 ± 15.9	75.1 ± 49.4	144 ± 85.6	384 ± 165^{^d,^e}	126 ± 146^{^d,^e}	105 ± 133
Stable	30.0 ± 13.2	50.6 ± 26.4	122 ± 60.4	116 ± 140^{^d}	61.9 ± 57.4^{^d}	70.1 ± 69.5
NSI
Growing	0.45 ± 0.08^{^d,^e}	0.36 ± 0.10^{^d,^e}	0.26 ± 0.05	0.31 ± 0.08^{^d,^f}	0.36 ± 0.11^{^d,^e}	0.38 ± 0.11^{^d,^f}
Stable	0.31 ± 0.14^{^d}	0.27 ± 0.10^{^d}	0.29 ± 0.09	0.22 ± 0.03^{^d}	0.28 ± 0.11^{^d}	0.29 ± 0.12^{^d}
Aspect ratio
Growing	0.89 ± 0.54	0.91 ± 0.33	1.21 ± 0.34	1.21 ± 0.27	1.03 ± 0.43	1.01 ± 0.54
Stable	0.90 ± 0.24	0.99 ± 0.29	1.09 ± 0.33	1.27 ± 0.81	1.00 ± 0.34	1.02 ± 0.40
Size ratio
Growing	0.56 ± 0.25	0.94 ± 0.31	2.93 ± 1.3^{^d,^f}	2.48 ± 0.71	1.49 ± 1.20	1.21 ± 0.91
Stable	0.70 ± 0.30	1.05 ± 0.34	1.63 ± 0.59^{^d}	1.96 ± 1.11	1.11 ± 0.59	1.19 ± 0.68

↵a Data are presented as mean ± SD.
↵b The “All” column includes all imaging studies for all cases.
↵c The “Initial” column includes the first imaging study for all cases.
↵d Significant difference between groups.
↵e P < .001.
↵f P < .01.