Choledocholithiasis characteristics with periampullary diverticulum and endoscopic retrograde cholangiopancreatography procedures: Comparison between two centers from Lanzhou and Kyoto

Table 2 Comparison of endoscopic retrograde cholangiopancreatography related contents of choledocholithiasis with periampullary diverticulum between Lanzhou and Kyoto

ERCP Item	Lanzhou (n = 829)	Kyoto (n = 241)	P
Intubation failure, n (%)	8 (1.0)	1 (0.4)	0.69
Intubation difficulty, n (%)	80 (9.7)	58 (24.1)	< 0.001
Difficulty to remove stone out, n (%)	290 (35.3)	127 (53.8)	< 0.001
Residual stone, n (%)	62 (7.6)	58 (24.6)	< 0.001
Procedure to duodenal papilla, n (%)
EST Only	419 (50.5)	217 (90.0)	< 0.001
EST + EPBD	352 (42.5)	1 (0.4)	< 0.001
EPBD only	14 (1.7)	0 (0.0)	0.049
Non-EST & non-EPBD	44 (5.3)	23 (9.5)	0.017
Post-complication (overall), n (%)	74 (8.9)	14 (5.8)	0.12
Acute cholangitis	22 (2.7)	1 (0.4)	0.035
Acute pancreatitis	49 (5.9)	8 (3.3)	0.11
Perforation	2 (0.2)	0 (0.0)	1.00
Bleeding	0 (0.0)	5 (2.1)	< 0.001

ERCP: Endoscopic retrograde cholangiopancreatography; EST: Endoscopic sphincterotomy; EPBD: Endoscopic balloon dilatation.