Pancreatic stents for the prevention of post-endoscopic retrograde cholangiopancreatography pancreatitis should be inserted up to the pancreatic body or tail

Table 3 Risk factors of post-endoscopic retrograde cholangiopancreatography hyperamylasemia (≥ pancreatic amylase isoenzyme median, 131 IU/L) (univariate analysis) n

	p-AMY < 131 IU/L1 (n = 70)	p-AMY ≥ 131 IU/L1 (n = 70)	P value
Age (≥ 71 yr)	29	41	0.063
Gender (male/female)	40/30	35/35	0.5
Pancreatic calcification	3	2	1
Parapapillary diverticulum	27	16	0.043
MPD ≥ 3.2 mm	36	36	1.0
EST	52	55	0.69
EPBD	3	3	1.0
Precut of Vater’s papilla	18	26	0.20
Stent inserted pancreatic head	58	66	0.06
Pancreatic stent migration within a week	11	12	1.0
Procedure time ≥ 60 min	45	57	0.048

¹Pancreatic amylase data were not available in seven cases, but the level of serum amylase was not elevated. MPD: Main pancreatic duct; EPBD: Endoscopic papillary balloon dilation.