Endoscopic sphincterotomy plus large-balloon dilation vs endoscopic sphincterotomy for choledocholithiasis: A meta-analysis

Table 2 Characteristics of the included randomized controlled trials

Ref.	Format	Country	Center involved	EST plus LBD, EST				Balloon diameter (mm)	Jadad score
				Number (n)	Male, female	Mean age (yr)	Stone size (mm)
Heo et al[22] 2007	Full text	Korea	1	100	48, 52	64	16.0 ± 0.71	12-20	4
				100	50, 50	63	15.0 ± 0.71
Hong et al[11] 2009	Abstract	Korea	1	70	Not reported	Not reported	> 15	15 or 20	1
				65			> 15
Kim et al[23] 2009	Full text	Korea	1	27	12, 15	70	15-38.3	15, 16.5 or 18	3
				28	14, 14	70	15-48
Kim et al[12] 2009	Abstract	Korea	1	104	53, 51	70	> 10	12-20	1
				100	49, 51	69	> 10
Stefanidis et al[24] 2011	Full text	Greece	1	45	24, 21	69	12-20	15, 18 or 20	4
				45	22, 23	68	12-20
Teoh et al[13] 2013	Full text	Hong Kong	2	73	32, 41	72	≥ 13	13-15	4
				78	40, 38	73	≥ 13

¹Values are mean ± SD. EST: Endoscopic sphincterotomy; LBD: Large-balloon dilation.