Double-balloon endoscopic retrograde cholangiopancreatography for patients who underwent liver operation: A retrospective study

Table 5 Differences of success rates, insertion and procedure time with or without adverse events

	With adverse events	Without adverse events
	9 patients, 9 procedures	57 patients, 95 procedures	P value1	Effect size2
Technical success	9/9	90/95	0.481	0.069
Procedures (%)	(100)	(94.7)
Diagnostic success	8/9	73/88	0.648	0.046
Procedures (%)	(88.9)	(83.0)
Therapeutic success	8/8	67/69	0.626	0.056
Procedures (%)	(100)	(97.1)
Overall success	8/9	73/95	0.405	0.082
Procedures (%)	(88.9)	(76.8)
Insertion time	16	18	0.795	0.093
Median, min (IQR)	(9-25)	(12-28)
Procedure time	60	34	0.034	0.762
Median, min (IQR)	(46-62)	(21-49)

¹χ²: success rates; Mann-Whitney U test: Insertion and procedure time.

²phi coefficient: success rates; Cohen’s d: Insertion and procedure time. Technical success: Endoscope reached the hepaticojejunostomy site; Diagnostic success: Successful cholangiography after cannulation to the bile duct; Therapeutic success: Completed interventions in the bile duct; Overall success: Completed diagnosis and interventions among all procedures; Insertion time: The time required to reach the hepaticojejunostomy site; Procedure time: The time from reaching the hepaticojejunostomy site to removal of the endoscope; IQR: Interquartile range.