Table 2.

Incidence and severity of post-endoscopic retrograde cholangiopancreatography pancreatitis

Ref.	Stent group (n)					Non-stent group (n)					P value
	S-sten	Mild PEP	Moderate PEP	Serve PEP	Total PEP	n	Mild PEP	Moderate PEP	Serve PEP	Total PEP
Kawaguch et al[16]	60	1	0	0	1	60	8	0	0	8	0.032
Lee et al[17]	48	5	1	0	6	51	12	2	1	15	0.031
Pan et al[18]	20		NA		4	20		NA		14	< 0.01
Sofuni et al[14]	186	12	4	0	16	204	22	8	1	31	0.021
Ito et al[19]	32	0	0	0	0	35	8	0	0	8	NA
Sofuni et al[15]	94	2	1	0	3	103	8	6	0	14	0.019
Tsuchiya et al[20]	32	1	0	0	1	32	2	1	1	4	NS
Harewood et al[21]	10	0	0	0	0	8		NA	0	3	0.020
Fazel et al[22]	38	2	0	0	2	32	5	2	3	10	< 0.05
Tarnasky et al[23]	41	1	0	0	1	39	5	5	0	10	0.003

PEP: Post-endoscopic retrograde cholangiopancreatography pancreatitis; S-stent: Successful stent; NA: Not available; NS: Not significant.