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Table 1 General characteristics of the included studies

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

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. 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