Systematic review and meta-analysis of laparoscopic and open gastrectomy for advanced gastric cancer

Table 1 Characteristics of included studies

Author	Country	Study type	Publication year	Study period	Sample size		Level of lymphadenectomy	Surgical extension	Reconstruction	Adjuvant chemotherapy (%)		Quality scores
Author	Country	Study type	Publication year	Study period	LG	OG	Level of lymphadenectomy	Surgical extension	Reconstruction	LG	OG	Quality scores
Huscher	Italy	RCT	2005	1992-1996	30	29	D1, D2	DG	B-II, R-Y	NR	NR	3*
Hur	Korea	Retrospective	2008	2004-2007	26	25	D2	DG	B-I, B-II	76.9	68	8
Du XH	China	Retrospective	2009	2004-2008	78	90	D2	DG	B-I, B-II	NR	NR	7
Hwang	Korea	Retrospective	2009	2004-2007	45	83	D1 + α/ β, D2	DG	B-I, B-II	93.2	89.0	7
Du J	China	Retrospective	2010	2005-2009	82	94	D2	TG	R-Y	100	100	8
Cai	China	RCT	2011	2008-2009	49	47	D2	DG, PG, TG	B-I, B-II, R-Y	100	100	2*
Scatizzi	Italy	Retrospective	2011	2006-2009	30	30	D2	DG	R-Y	NR	NR	8
Shuang	China	Retrospective	2011	2005-2007	35	35	D2	DG	B-II	NR	NR	8
Zhao	China	Retrospective	2011	2004-2009	346	313	D1 + α/β, D2	DG	B-I, B-II	93.1	91.7	9
Chen	China	Retrospective	2012	2008-2010	224	112	D2	DG, TG	B-I, B-II, R-Y	NR	NR	8
Chun	Korea	Retrospective	2012	2004-2009	52	67	D2	DG	B-I, B-II, R-Y	NR	NR	9
Kim	Korea	Retrospective	2012	1999-2007	88	88	D2	DG, TG	B-I, B-II, R-Y	NR	NR	9
Moisan	Chile	Retrospective	2012	2005-2010	31	31	D1 + α/β, D2	DG, TG	B-II, R-Y	19.4	22.6	8
Siani	Italy	Retrospective	2012	2003-2009	25	25	D1 + α/β, D2	TG	R-Y	NR	NR	9
Shinohara	Japan	Retrospective	2013	1998-2008	186	123	D2	DG, PG, TG	B-I, R-Y	61.3	58.5	9

Abbreviations: RCT Randomized controlled trial, LG Laparoscopic gastrectomy, OG Open gastrectomy, DG Distal gastrectomy, PG Proximal gastrectomy, TG Total gastrectomy, B-I Billroth-I, B-II Billroth-II, R-Y Roux-en-Y, NR Not reported. *Jadad scores.