Robot-assisted laparoscopic vs open gastrectomy for gastric cancer: Systematic review and meta-analysis

Table 2 Main perioperative data of the included studies

Ref.	Open conversion (%)	Group	Operation time (min ± SD)1	P value	Blood loss (mL ± SD)1	P value	Harvested nodes (n ± SD)1	P value	Morbidity (%)	P value	Mortality (%)	P value	Hospital stay (d ± SD)1	P value
Kim et al[21]	0	RAG OG	259.2 ± 38.9 126.7 ± 24.1	< 0.05	30.3 ± 15.1 78.8 ± 74.1	< 0.05	41.1 ± 10.9 43.3 ± 10.4	NS	0 20	NS	0 0	NS	5.1 ± 0.3 6.7 ± 1.4	< 0.05
Caruso et al[22]	0	RAG OG	290 ± 67 222 ± 94	< 0.05	197.6 ± 202.1 386.1 ± 95.5	< 0.05	28.0 ± 11.2 31.7 ± 15.6	NS	10.32 10.02	NS	0 3.3	NS	9.6 ± 2.8 13.4 ± 8.5	< 0.05
Huang et al[23]	NR	RAG OG	415.9 ± 101.2 331.8 ± 92.9	< 0.05	93.9 ± 89 192 ± 193	< 0.05	32 ± 13.7 34 ± 14.8	NS	15.4 14.7	NS	1.4 2.6	NS	11.3 ± 14.4 16.5 ± 13.6	< 0.05
Kim et al[24]	NR	RAG OG	226 ± 54 158 ± 52	< 0.05	85 ± 160 192 ± 193	< 0.05	40.2 ± 15.5 40.5 ± 16.6	NS	10.1 10.7	NS	0.5 0.5	NS	7.5 10.2	< 0.05
Procopiuc et al[25]	0	RAG OG	320.8 ± 85.1 243.3 ± 57.9	< 0.05	208.2 ± 139.8 564.6 ± 468.4	< 0.05	22.0 ± 8.9 25.2 ± 9.0	NS	11.12 20.72	NS	0 0	NS	8.1 ± 2.0 11.4 ± 2.9	< 0.05
Wang et al[26]	1.93	RAG OG	242.7 ± 43.8 192.4 ± 31.5	< 0.05	94.2 ± 51.5 152.8 ± 94.2	< 0.05	29.1 ± 6.7 30.1 ± 7.2	NS	9.3 10.3	NS	0 0	NS	5.7 ± 2.3 6.4 ± 2.5	< 0.05

¹Mean value;

²Major complications rate base on Clavien-Dindo classification ≥ 3, such as anastomotic and duodenal lekeage;

³Rate of patients excluded from the study analysis. RAG: Robot-assisted gastrectomy; OG: Open gastrectomy; NS: Not statistically significant difference.