Table 3.

The incidence of adverse events in difficult cannulation cases in the elderly group after repeated guidewire-assisted cannulation, needle knife precut, and transpancreatic sphincterotomy

	Guidewire	NKP	TPS	P value1
Adverse events	n = 20	n = 21	n = 8
PEP	10% (2)	- (0)	- (0)	0.203
Overall adverse events	15% (3)	14.3% (3)	- (0)	0.129

¹Fisher’s exact test.

PEP: Post-endoscopic retrograde cholangiopancreatography; TPS: Transpancreatic sphincterotomy; NKP: Needle knife precut.