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

Table 1 Baseline characteristics of include studies and quality assessment

Ref.	Year	Country	Type of study	Total patients (n)	Group	n	Sex (M/F)	P value	Age (mean ± SD)	P value	BMI (mean ± SD)	P value	Quality assessment
Kim et al[21]	2010	South Korea	Retrospective clinical trial	28	RAG	16	10/6	NS	53.8 ± 15.6 56.0 ± 12.4	NS	21.3 ± 3.4 25.2 ± 1.9	> 0.05	6 stars1
					OG	12	9/3
Caruso et al[22]	2011	Italy	Retrospective clinical trial	149	RAG	29	18/11	NS	64.8 ± 12.4 65.1 ± 11	NS	27 ± 3 28 ± 4	NS	6 stars1
					OG	120	65/55
Huang et al[23]	2012	China	Retrospective clinical trial	625	RAG	39	19/20	< 0.05	65.1 ± 15.9 67.9 ± 30.1	NS	24.2 ± 3.7 23.7 ± 3.6	NS	5 stars1
					OG	586	406/180
Kim et al[24]	2012	South Korea	Retrospective clinical trial	4978	RAG	436	265/171	NS	54.2 ± 12.5 57.7 ± 11.8	< 0.05	23.6 ± 3.1 23.8 ± 8.0	NS	5 stars1
					OG	4542	3008/1534
Procopiuc et al[25]	2015	Romania	Retrospective clinical trial	47	RAG	18	13/5	NS	59.1 ± 13.7 60.1 ± 12.4	NS	26.0 ± 3.24 24.8 ± 4.58	NS	6 Stars1
					OG	29	21/8
Wang et al[26]	2016	China	Randomized clinical trial	296	RAG	151	109/42	NS	57.5 ± 12.7 55.9 ± 13.1	NS	22.1 ± 2.9 21.3 ± 2.5	NS	3 points2
					OG	145	89/56

¹According to the NOS (Newcastle-Ottawa Scale) classification;

²According to Jadad’s scale for reporting randomized controlled trials. RAG: Robot-assisted gastrectomy; OG: Open gastrectomy; NS: Not statistically significant.