Propensity Score Analysis of Flow Diverters Placed in Scaffolding Stents

American Journal of Neuroradiology

Table 1:

Characteristics of the patients and aneurysms before and after propensity score matching

	Before Propensity Score Matching			After Propensity Score Matching
	Bare FD Group (n = 105)	Scaffolding Group (n = 22)	P Value	Bare FD Group (n = 24)	Scaffolding Group (n = 15)	P Value
Sex^{^a} (female)	77 (73.3)	12 (54.5)	.08	18 (75.0)	7 (46.6)	.072
Age (yr)^{^b}	51 (14–78)	54.5 (31–74)	.54	50 (32–76)	53 (35.0–74.0)	.777
Location^{^a} (anterior)	96 (91.4)	20 (90.9)	>.99	19 (79.1)	13 (86.6)	.685
Location^{^a} (proximal)	16 (15.2)	6 (27.3)	.21	6 (25)	4 (26.7)	>.99
Morphology^{^a} (saccular)	99 (94.3)	13 (59.1)	<.001^{^c}	20 (83.3)	11 (73.3)	.685
Size^{^b}	7 (4.5)	13.1 (10.7)	<.001^{^c}	9.8 (5.9)	9.9 (5.1)	.939
Recurrence^{^a} (yes)	9 (8.4)	3 (13.6)	.43	1 (4.1)	2 (13.3)	.547

Note:—Values are mean (range) for quantitative variables or numbers and percentages for qualitative variables.
↵a Count (percentage).
↵b Mean (SD).
↵c Statistically significance.

Table 2:

Follow-up imaging results before and after propensity score matching^{^a}

	All Cohorts		P Value	After PSM		P Value
	Silk Alone (n = 105)	SG (n = 22)	P Value	Silk Alone (n = 24)	SG (n = 15)	P Value
0- to 3-month follow-up
Occlusion^{^b}	36 (60.0)	5 (33.3)	.063	7 (41.2)	3 (33.3)	>.99
Residual filling^{^b}	24 (40.0)	10 (66.6)		10 (58.8)	6 (66.6)
3- to 6-month follow-up
Occlusion^{^b}	50 (67.5)	13 (72.2)	.703	10 (55.5)	9 (75.0)	.440
Residual filling^{^b}	24 (32.4)	5 (27.7)		8 (44.5)	3 (25.0)
7- to 12-month follow-up
Occlusion^{^b}	61 (75.3)	14 (93.3)	.178	13 (65.0)	9 (90.0)	.210
Residual filling^{^b}	20 (24.6)	1 (6.6)		7 (35.0)	1 (10.0)
>12-month follow-up
Occlusion^{^b}	75 (88.2)	15 (93.7)	>.99	14 (73.6)	11 (91.6)	.363
Residual filling^{^b}	10 (11.7)	1 (6.2)		5 (26.4)	1 (8.4)