Endoscopic versus Percutaneous Biliary Drainage in Palliation of Advanced Malignant Hilar Obstruction: A Meta-Analysis and Systematic Review

Table 1

Basic characteristics of the included studies.

Number	Name	Type of study	Type of drainage	Number of patients	Number of patients in PTBD group	Number of patients in EBD group	M/F	Age in years, median	Location of stricture	Type of cancer
1	Liu et al. 1998 [18]	Retrospective	Endoscopic	49	0	49	33/16	68	Hilum	CCA
2	Kaiho et al. 1999 [19]	Retrospective	Percutaneous	21	21	0	9/12	67	Hilum	All cancers
3	Born et al. 2000 [20]	Retrospective	Both	59	39	20	30/29	71	Hilum	CCA
4	Piñol et al. 2002 [21]	RCT	Both	54	28	26	23/31	73	Mixed	All cancers
5	Rerknimitr et al. 2004 [22]	Retrospective	Endoscopic	63	0	63	35/28	65	Hilum	CCA
6	Saluja et al. 2008 [23]	RCT	Both	54	27	27	18/36	51	Hilum	Gall bladder cancer
7	Paik et al. 2009 [24]	Retrospective	Both	85	41	44	58/27	66	Hilum	CCA
8	Kloek et al. 2010 [25]	Retrospective	Both	101	11	90	70/31	61	Hilum	CCA
9	Choi et al. 2012 [26]	Retrospective	Both	60	31	29	46/14	59	Hilum	HCC

CCA: cholangiocarcinoma.
HCC: hepatocellular carcinoma.
M/F: male/female.
RCT: randomized controlled trial.
EBD: endoscopic biliary drainage.
PTBD: percutaneous transhepatic biliary drainage.