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 5 Subgroup analysis of postoperative length of stay

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								0.97
China	6	94%	RE	−1.42	−2.79	−0.06	0.04
Japan	3	90%	RE	−1.36	−4.39	1.68	0.38
ROK	5	28%	FE	−1.06	−1.34	−0.78	<0.00001
Western countries	1	-	RE	−1.10	−3.30	1.10	0.33
Type of gastrectomy								0.01
Distal gastrectomy	8	76%	RE	−0.91	−1.59	−0.23	0.009
Total gastrectomy	1	-	RE	1.30	−0.51	3.11	0.16
^aUndifferentiated	6	91%	RE	−1.88	−3.05	−0.71	0.002
Stages								0.95
EGC or stage I	8	93%	RE	−1.19	−2.32	−0.07	0.04
AGC	5	86%	RE	−1.42	−2.47	−0.37	0.008
^bMixture	2	88%	RE	−1.60	−5.51	2.31	0.42

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