Impact of body mass index on short-term outcomes of laparoscopic gastrectomy in Asian patients: A meta-analysis

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.

Table 2 Summary statistics of pooled odds ratio on various postoperative complications comparing high body mass index and normal body mass index groups receiving laparoscopic gastrectomy

Complication variable	No. of studies	No. of pooled patients	Pooled OR	95%CI	Test of heterogeneity	Test of overall effect
					P value	P value
Overall complications	9	6077	1.12	0.95-1.33	0.734	0.169
Anastomotic leakage	6	3939	1.31	0.62-2.79	0.642	0.476
Anastomotic stricture	4	3587	0.85	0.27-2.66	0.489	0.775
Anastomotic bleeding	5	3798	0.63	0.27-1.45	0.942	0.277
Abdominal abscess	5	3801	1.56	0.91-2.67	0.615	0.103
Pancreatic leakage	6	3937	0.52	0.20-1.35	0.581	0.179
Ileus	4	3584	1.96	0.79-4.83	0.382	0.144
Wound	6	3939	1.77	0.92-3.42	0.289	0.087

OR: Odds ratio; CI: Confidence interval.