Table 1.

Comparison of neointimal ratio, stent-coverage ratio, and thrombus formation among stents

	Flex	Shield	Solitaire	P value Flex vs Shield	P value Shield vs Solitaire	P value Flex vs Solitaire
Neointimal ratio on day 21
SAPT	0.21±0.16*	0.22±0.11*	0.044±0.12	NS	<0.001	<0.001
DAPT	0.087±0.10	0.095±0.063	0.023±0.012	NS	<0.001	<0.001
Total	0.12±0.13	0.13±0.098	0.032±0.081	NS	<0.05	<0.05
Stent-coverage ratio on day 7
SAPT	0.82±0.24*	0.79±0.24*	0.78±0.22	NS	NS	NS
DAPT	0.32±0.28	0.59±0.36	0.81±0.22	<0.001	<0.001	<0.001
Stent-coverage ratio on day 14
SAPT	0.93±0.096	0.92±0.13	0.81±0.28	NS	NS	NS
DAPT	0.92±0.093	0.93±0.13	0.90±0.16	<0.001	NS	0.031
Stent-coverage ratio on day 21
SAPT	0.96±0.10*	0.98±0.059*	0.85±0.27	NS	0.011	NS
DAPT	0.88±0.15	0.93±0.12	0.86±0.18	0.002	NS	NS
%Thrombus formation on day 7
SAPT	100±0.00*	36.36±48.38*	43.08±49.90	<0.001	NS	<0.001
DAPT	9.42±29.32	9.40±29.28	33.33±47.35	ns	<0.001	<0.001
Total	39.02±48.90	19.41±39.63	36.93±48.40	<0.001	<0.001	NS

*P<0.001 compared with DAPT.

DAPT, dual antiplatelet therapy; Flex, Pipeline Flex embolization device; SAPT, single antiplatelet therapy; Shield, Pipeline Flex embolization with Shield technology.