Robot-assisted vs laparoscopy-assisted gastrectomy for gastric cancer: A meta-analysis based on 3518 subjects

Table 1 Main characteristic of the included studies

Ref.	Country	Group	No. of patients	Age (yr)	Males (%)	BMI (kg/m2)	TNM stage (I/II/III/IV)	NOS score
Eom et al[17]	South Korea	RAG	30	52.8	70	24.2	25/3/2/0	6
		LAG	62	57.9	66.1	24.1	56/6/0/0
Huang et al[9]	Taiwan China	RAG	39	65.1	48.7	24.2	29/7/3/0	6
		LAG	64	65.6	67.2	24.7	55/9/0/0
Hyun et al[18]	South Korea	RAG	38	54.2	65.8	23.8	30/5/3/0	7
		LAG	83	60.3	66.3	23.8	67/9/7/0
Kang et al[12]	South Korea	RAG	100	53.2	63	23.7	82/11/7/0	6
		LAG	282	58.8	67.7	23.6	NR
Kim et al[3]	South Korea	RAG	436	54.2	60.8	23.6	350/51/32/0	7
		LAG	861	58.8	63.9	23.5	714/96/43/0
Kim et al[13]	South Korea	RAG	16	53.8	62.5	21.3	NR	6
		LAG	11	57.9	90.9	25.3	NR
Liu et al[6]	China	RAG	48	51.8	85.4	21.2	14/5/27/2	7
		LAG	48	52.1	83.3	21	16/6/23/3
Noshiro et al[19]	Japan	RAG	21	66	66.7	22.8	18/-/-/-	6
		LAG	160	69	63.8	21.8	113/-/-/-
Pugliese et al[14]	Italy	RAG	16	71	NR	28.8	NR	7
		LAG	48	71	NR	28.8	NR
Woo et al[1]	South Korea	RAG	236	54	57.6	23.5	236/0/0/0	6
		LAG	591	58.3	61.6	23.5	591/0/0/0
Yoon et al[15]	South Korea	RAG	36	53.9	50	23.2	29/7/0/0	7
		LAG	65	56.9	47.7	23.6	55/7/3/0
Zhang et al[11]	China	RAG	97	56.1	68	22.5	23/22/52/0	7
		LAG	70	54.8	70	21.7	8/17/45/0
Zhao et al[20]	China	RAG	30	71.8	73.3	23.6	2/18/9/1	8
		LAG	30	72.4	76.7	23.9	1/25/3/1

BMI: Body mass index; TNM: Tumor node metastases; NOS: Newcastle-ottawa quality scale; RAG: Robot-assisted gastrectomy; LAG: Laparoscopy-assisted gastrectomy; NR: Not Reported.