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

Table 3 Insertion and procedure time

	Liver operation group			Control group
	Hepatectomy	LDLT	Total	PD	PPPD	SSPPD	Total	P value1	Effect size2
Insertion time	19.5	24	22	14	26	14	14	< 0.001	0.772
Median, min (IQR)	(14.3-29.3)	(18-41)	(16-40)	(7-20)	(15.5-44.8)	(10.3-21.3)	(10-23)
Procedure time	45.5	40	43.5	34	18	30	30	0.033	0.444
Median, min (IQR)	(29.8-62.5)	(22.8-60.5)	(28.3-61.5)	(24-45)	(14.5-30.8)	(21.5-43.8)	(21-44)

¹Mann-Whitney U test (Total of Liver operation group vs Control group).

²Cohen’s d. LDLT: Living donor liver transplantation; PD: Pancreatoduodenectomy; PPPD: Pylorus-preserving pancreatoduodenectomy; SSPPD: Subtotal stomach-preserving pancreatoduodenectomy; 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.