Short-and long-term outcomes of laparoscopic versus open gastrectomy in patients with gastric cancer: a systematic review and meta-analysis of randomized controlled trials

Table 3 Subgroup analysis of EBL

Variables	Number of studies	Heterogeneity	Model	MD	95% CI		P	P_sub
Variables	Number of studies	I²	Model	MD	Lower	Upper	P	P_sub
Countries								0.0007
China	7	91%	RE	−39.05	−60.33	−17.77	0.0003
Japan	3	0%	FE	−130.65	−157.30	−104.00	<0.00001
ROK	4	86%	RE	−80.13	−126.45	−33.80	0.0007
Western countries	1	-	RE	−75.90	−157.81	6.01	0.07
Type of gastrectomy								0.15
Distal gastrectomy	8	95%	RE	−75.38	−117.76	−33.00	0.0005
Total gastrectomy	1	-	RE	−29.30	−58.20	−0.40	0.05
^aUndifferentiated	6	81%	RE	−58.10	−80.60	−35.61	<0.00001
Stages								0.010
EGC or stage I	8	90%	RE	−81.76	−115.00	−48.52	<0.00001
AGC	4	95%	RE	−59.62	−109.49	−9.74	0.02
^bMixture	3	0%	FE	−27.79	−42.53	−13.05	0.0002

ROK Republic of Korea, EGC early gastric cancer, AGC advanced gastric cancer, P_subP-value of subgroup
^aUndifferentiated: there was undifferentiated of type of gastrectomy in original articles
^bMixture: EGC or stage I gastric cancer plus AGC

ISSN: 1477-7819