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

Table 4

Comparison of adverse events between the EST and non-EST groups.

	EST group; ()	Non-EST group; ()	value
Adverse events ( (%))	5 (15.6)	5 (13.9)	0.888
Pancreatitis	1 (3.1)	0 (0)	0.953
Cholecystitis	2 (6.3)	3 (8.3)	0.891
Migration	2 (6.3)	2 (5.6)	0.693
Bleeding	0 (0)	0 (0)	—
Perforation	0 (0)	0 (0)	—

EST: endoscopic sphincterotomy