Table 1.

Characteristics of nine studies included in the meta-analysis

Study	Country	Study type	Inclusion period	Sample size	Type of gastrectomy	BMI cutoff point	Adjustment	Quality
Chen et al[20]	China	RC	2007-2010	531	LG	25	1, 3, 5	9
Chen et al[17]	China	RC	2004-2016	1691	LAG TLG	25	1, 2, 4, 5, 6, 7	8
Jung et al[19]	South Korea	RC	2006-2012	1512	LDG	25	1, 2, 3, 4, 6, 7	8
Lee et al[27]	South Korea	RC	-2005	1485	LAG	25	1, 2, 3, 4, 5, 7	9
Oki et al[24]	Japan	RC	2005-2009	138	TLDG	25	1, 2, 4, 5, 6, 7	8
Shimada et al[21]	Japan	RC	2007-2014	173	LADG	25	1, 2, 3, 4, 5, 6, 7	8
Shin et al[23]	South Korea	RC	2003-2005	192	LG	25	1, 2, 5, 6, 7	8
Yamada et al[22]	Japan	RC	1999-2005	141	LADG	25	1, 5, 6, 7	9
Yang et al[18]	China	RC	2009-2012	214	LAG	25	1, 2, 3, 5, 6, 7	8

1: Postoperative complications; 2: Postoperative hospital stay; 3: Mortality; 4: Time to resuming food intake; 5: Operative time; 6: Blood loss; 7: Retrieved lymph nodes. BMI: Body mass index; RC: Retrospective cohort; LG: Laparoscopic gastrectomy; TLG: Totally laparoscopic gastrectomy.