Risk factors of lymph node metastasis in the splenic hilum of gastric cancer patients: a meta-analysis

Table 1 General characteristics of the included studies

Author	Year	Country	Number	Method	Risk factors	Quality
Jeong et al. [9]	2018	Korea	665	Retrospective	2, 4, 5, 6, 8, 9, 10, 14	High/8
Chen et al. [10]	2016	China	243	Retrospective	1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14	High/8
Bian et al. [11]	2016	China	380	Retrospective	15	High/9
Chen et al. [5]	2014	China	205	Retrospective	1, 2, 3, 4, 5, 6, 8, 9, 11, 14	High/8
Huang et al. [12]	2014	China	346	Retrospective	1, 2, 4, 5, 8, 9, 14, 15	High/9
Zhu et al. [13]	2012	China	265	Retrospective	2, 5, 6, 7, 8, 9, 10	High/8
Zhang et al. [14]	2011	China	590	Retrospective	1, 2, 3, 4, 5, 6, 15	High/8
Kosuga et al. [15]	2011	Japan	280	Retrospective	1, 2, 3, 4, 5, 8	High/8
Aoyagi et al. [16]	2010	Japan	191	Retrospective	1, 2, 3, 4, 5, 6, 8, 9, 12, 13, 14, 15	Moderate/7
Shin et al. [17]	2009	Korea	319	Retrospective	1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14	Moderate/7
Sasada et al. [18]	2009	Japan	201	Retrospective	2, 8	Moderate/7
Huang et al. [19]	2009	China	237	Retrospective	2, 4, 5, 6, 8, 9	Moderate/6
Kunisaki et al. [20]	2007	Japan	118	Retrospective	2, 3, 4, 5, 8, 12, 13, 14, 15	High/9
Ikeguchi et al. [21]	2004	Japan	225	Retrospective	9	Moderate/6
Stefan et al. [22]	2001	Germany	112	Retrospective	2, 4, 6, 7, 8, 14	Moderate/7

1, age; 2, gender; 3, tumor size; 4, tumor location; 5, depth of invasion; 6, Borrmann type; 7, Lauren’s type; 8, differentiation; 9, lymph node metastasis; 10, distance metastasis; 11, neurological invasion; 12, vascular invasion; 13, lymphatic invasion; 14, TNM stage; 15, positive lymph node metastasis in other groups. High, NOS score > 7 points; low, NOS score < 6 points; moderate, 6–7 points

ISSN: 1477-7819