Endoscopic Sphincterotomy before Fully Covered Metal Stent Placement Is Not Required for Distal Malignant Biliary Stricture due to a Pancreatic Head Tumor

Table 3

Comparison of placed fully covered self-expandable metal stents between EST and non-EST groups.

	EST group; ()	Non-EST group; ()	value
WallFlex Biliary RX stent	22	29	0.400
Niti-S COMVI stent	4	4
X-Suit NIR Biliary Metal stent	2	1
Hanarostent	1	2
ZEO stent	1	0
Bonastent	1	0
Niti-S SUPREMO-12 stent	1	0
Stent length
6 cm	17	29	0.016
7 cm	1	0
8 cm	14	7	0.030
Stent diameter
10 mm	31	36
12 mm	1	0

EST: endoscopic sphincterotomy.