Table 2.

Characteristics of the included studies on transcatheter arterial embolization for lower gastrointestinal bleeding.

Author	Study type	Study period	Country	No. of patients	Sex (M/F)	Mean age	Primary embolic agent	NBCA-lipiodol ratio (%)	No. of coils (Mean)	Type of coils	Coagulopathy
Funaki et al., 200117	R	1995–2000	US	27 of 27	16/11	72	Coil	NA	NR	Pushable	NR
DeBarros et al., 200218	R	1993–1999	US	16 of 27	10/6	69	Coil	NA	NR	Pushable	NR
Horiguchi et al., 200319	R	NR	Japan	6 of 14	4/2	65	Coil	NA	4–5 (4.2)	Pushable	NR
Kuo et al., 200320	R	1992–2002	US	22 of 22	11/11	62	Coil	NA	NR	Pushable	NR
D’Othée et al., 200621	R	1997–2004	US	19 of 19	13/6	70	Coil	NA	2–6 (3)	Pushable	NR
Nawai et al., 200623	R	2002–2003	Malaysia	6 of 6	2/4	74	Coil	NA	2–12 (7.2)	Pushable	NR
Frodsham et al., 200925	R	2005–2009	US	14 of 14	9/5	77	NBCA	NR	NA	NA	5 of 14
Kwak et al., 200926	R	2003–2007	Korea	17 of 36	13/4	65	Coil	NA	NR	Pushable	NR
Huang et al., 201129	R	2006–2008	Taiwan	27 of 27	22/5	63	NBCA	10 to 40	NA	NA	NR
Teng et al., 201335	R	1997–2009	Korea	26 of 26	19/7	69	Coil	NA	NR	Pushable	NR
Yata et al., 201336	R	2005–2012	Japan	21 of 37	16/5	67	NBCA	17 to 50	NA	NA	10 of 21
Ahmed et al., 201538	R	2002–2012	US	38 of 39	NR	60	Coil	NA	NR	Detachable or pushable	NR
Shimohira et al., 201539	R	NR	Japan	5 of 5	2/3	76	Coil	NA	1–4 (2.4)	Detachable	NR
Koganemaru et al., 201641	R	2010–2014	Japan	5 of 5	4/1	59	Coil	NA	1–2 (1.6)	Detachable	2 of 5
Zhao et al., 201642	R	2013–2015	China	7 of 7	2/5	70	NBCA	25 to 33	NA	NA	0 of 7
Kwon et al., 201812	R	2007–2016	Korea	6 of 46	NR	NR	NBCA	20 to 50	NA	NA	NR
Kwon et al., 201945	RC	2005–2017	Korea	81 of 127	NR	NR	NBCA	25 to 50	NA	NA	NR
Kwon et al., 201945	RC	2005–2017	Korea	8 of 127	NR	NR	Coil	NA	NR	Pushable	NR
Kinoshita et al., 20215	R	2013–2019	Japan	17 of 17	15/2	69	Coil	NA	2–8	Detachable	1 of 17

NA, not applicable; NBCA, n-butyl cyanoacrylate; No., number; NR, not reported; R, retrospective; RC, retrospective comparative.