Postoperative Complications of Laparoscopic Total Gastrectomy versus Open Total Gastrectomy for Gastric Cancer in a Meta-Analysis of High-Quality Case-Controlled Studies

Table 1

Quality assessment of CCSs based on the Newcastle-Ottawa scoring system.

		Selection				(maximum of; 2 stars)	Exposure
Author	Year	Is the case definition adequate?	Representativeness of the cases	Selection of controls	Definition of controls	Comparability on the basis of the design or analysis	Ascertainment of exposure	Same method of ascertainment	Nonresponse rate
Kim et al. [9]	2008
Topal et al. [10]	2008
Kawamura et al. [11]	2009
Kim et al. [12]	2011
Siani et al. [13]	2012
Bo et al. [14]	2013
Guan et al. [15]	2013
Hong et al. [16]	2013
Kim et al. [17]	2013
Kim et al. [18]	2013
Lee et al. [19]	2013
Shim et al. [20]	2013
Lee et al. [21]	2014
Lee et al. [7]	2015
Ramagem et al. [22]	2015

CCSs, case-controlled studies. controls for patients’ characteristics (age and gender) and clinical or pathological TNM classification.