Pancreatic stents to prevent post-endoscopic retrograde cholangiopancreatography pancreatitis: A meta-analysis

Table 1 Patient characteristics of selected studies

Ref.	Country	Sample number		Mean age		Sex (male / female)		Patients
		Stent	No stent	Stent	No stent	Stent	No stent
Smithline et al[55], 1993	United States	43	50	46	47	19/81	22/78	SOD, CBD < 10 mm
Tarnasky et al[51], 1998	United States	41	39	45.7	46.4	NA	NA	SOD
Fazel et al[52], 2003	United States	38	36	45.8	43.6	4/32	6/32	SOD, difficult cannulation
Sofuni et al[19], 2007	Japan	98	103	67.0	66.0	60/38	64/38	NA
Tsuchiya et al[20], 2007	Japan	32	32	65.0	69.0	19/13	22/10	NA
Ito et al[22], 2010	Japan	35	35	68	70	19/16	20/15	Difficult cannulation
Sofuni et al[27], 2011	Japan	213	213	NA	NA	NA	NA	Risk factors, such as SOD, history of pancreatitis
Pan et al[26], 2011	China	20	20	61.0	57.0	9/11	10/10	High-risk patients
Kawaguchi et al[30], 2012	Japan	60	60	66.0	68.0	27/33	25/35	SOD, previous PEP
Lee et al[53], 2012	South Korea	50	51	57.3	57.9	17/33	21/30	Difficult cannulation
Yin et al[45], 2016	China	104	102	57.2	57.4	59/45	55/47	High-risk patients

SOD: Sphincter of Oddi dysfunction; CBD: Central bile duct; NA: Not available; PEP: Post-endoscopic retrograde cholangiopancreatography pancreatitis.