A comparison of postoperative outcomes between robotic-assisted and laparoscopic-assisted total gastrectomy: a comprehensive meta-analysis and systematic review

Table 2 Results of quality assessment using the Newcastle-Ottawa scale for included studies

study	Selection				Comparability	Exposure/Outcome			Total scores
	a	b	c	d	e	f	g	h
Chen et al. (2022) *	★	☆	☆	★	★ ★	★	☆	★	6
Hikage et al. (2022) *	★	★	★	★	★ ★	★	★	★	9
Jia et al. (2023) *	★	★	★	★	★ ★	★	☆	★	8
Roh et al. (2021) *	★	★	★	★	★ ★	★	★	★	9
Shibasaki et al. (2022) *	★	★	★	★	★ ★	★	☆	★	8
Son et al. (2014) *	★	★	★	★	★ ★	★	★	★	9
Wang et al. (2022) *	★	★	★	★	★ ★	★	☆	★	8
Ye et al. (2019) *	★	★	☆	★	★ ★	★	☆	★	7
Yoon et al. (2012) **	★	☆	★	★	★ ★	★	★	★	8

*, Study quality of case-control study: a, Is the case definition adequate?; b, Representativeness of the cases; c, Selection of Control; d, Definition of Controls; e, Comparability of cases and controls on the basis of the design or analysis; f, Ascertainment of exposure; g, Same method of ascertainment for cases and controls; h, Non-Response Rate; **, Study quality of cohort study: a, Representativeness of the exposed cohort; b, Selection of the non exposed cohort; c, Ascertainment of exposure to implants; d, Demonstration that outcome of interest was not present at start of study; e, Comparability of cohorts on the basis of the design or analysis f, Assessment of outcome; g, Was follow up long enough for outcomes to occur; h, Adequacy of follow up of cohorts; ★, 1 score; ☆, 0 score

ISSN: 1471-2482