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

Table 2 Technical, diagnostic, therapeutic and overall success rates

	Liver operation group			Control group
	26 patients, 45 procedures			40 patients, 59 procedures
	Hepatec-tomy	LDLT	Total	PD	PPPD	SSPPD	Total	P value1	Effect size2
Technical success	16/18	26/27	42/45	13/13	4/4	40/42	57/59	0.439	0.076
Procedures (%)	(88.9)	(96.3)	(93.3)	(100)	(100)	(95.2)	(96.6)
Diagnostic success	11/16	24/26	35/42	12/12	3/4	31/39	46/55	0.968	0.004
Procedures (%)	(68.8)	(92.3)	(83.3)	(100)	(75.0)	(79.5)	(83.6)
Therapeutic success	10/10	22/23	32/33	12/12	3/3	28/29	43/44	0.836	0.024
Procedures (%)	(100)	(95.7)	(97.0)	(100)	(100)	(96.6)	(97.7)
Overall success	11/18	23/27	34/45	13/13	3/4	31/42	47/59	0.617	0.049
Procedures (%)	(61.1)	(85.2)	(75.6)	(100)	(75.0)	(73.8)	(79.7)

¹χ² (Total of Liver operation group vs Control group).

²phi coefficient. LDLT: Living donor liver transplantation; PD: Pancreatoduodenectomy; PPPD: Pylorus-preserving pancreatoduodenectomy; SSPPD: Subtotal stomach-preserving pancreatoduodenectomy; 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.