Table 3:

Packing density versus primary outcome

Packing Density^{^a}	Platinum Primary Outcome (Angiographic Outcome Only)		Hydrogel Primary Outcome (Angiographic Outcome Only)		Total Primary Outcome (Angiographic Outcome Only)
Packing Density^{^a}	No	Yes	No	Yes	No	Yes
PRET-1
Valid No.	69	51	57	61	126	112
Percentile 25	14.72	11.92	33.91	18.55	18.28	13.79
Median	22.18	17.13	50.92	36.93	29.60	23.47
Median	35.52	27.61	89.26	58.88	53.60	46.90
PRET-2
Valid No.	49	47	55	37	104	84
Percentile 25	18.15	6.02	34.62	11.64	24.46	7.37
Median	34.05	19.66	84.80	40.38	51.49	29.12
Percentile 75	60.15	43.21	172.95	94.72	111.77	65.92
PRET
Valid No.	118	98	112	98	230	196
Percentile 25	15.23	7.65	34.27	17.91	21.81	12.55
Median	24.14	17.66	62.47	38.50	37.94	25.58
Percentile 75	43.72	35.71	114.34	71.66	74.87	50.58

↵a Packing density is coil volume (V) divided by aneurysm volume (VA). V = π(c/2)² L, where c is coil caliber and L is coil length. VA = 4/3 π ab (a + b)/2, where a and b are half the long and short axes of the aneurysm.