Pancreatic stent improves the success rate of needle-knife papillotomy in patients with difficult biliary cannulation

Table 3 Subgroup analysis for patients with periampullary diverticulum, surgically altered anatomy, and significant bleeding during needle-knife papillotomy, n (%)

	Total	PS-NKP group	FH-NKP group	P value
Patients with periampullary diverticulum	(n = 44)	(n = 24)	(n = 20)
NKP success	34 (77.3)	21 (87.5)	13 (65)	0.076
NKP failure	10 (22.7)	3 (12.5)	7 (35)
Patients with surgically altered anatomy	(n = 4)	(n = 1)	(n = 3)
NKP success	2 (50)	1 (100)	1 (33.3)	NP
NKP failure	2 (50)	0	2 (66.7)
Patients with significant bleeding during NKP	(n = 11)	(n = 2)	(n = 9)
NKP success	6 (54.5)	1 (50)	1 (20.0)	0.887
NKP failure	5 (45.5)	1 (50)	4 (80.0)

NKP: Needle-knife papillotomy; PS: Pancreatic stent; FH: Freehand; NP: Not performed.