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Table 1 Main characteristics of studies included in the meta-analysis

From: Robotic versus laparoscopic gastrectomy for gastric cancer: a systematic review and meta-analysis

Study Year Country Design Study period Group Cases Age BMI (kg/m2) Surgical extension
Zhang [21] 2012 China R 2009-2011 RG 97 56.1 ± 5.8 22.5 ± 3.6 D, P, T
      LG 70 54.8 ± 4.9 21.7 ± 2.1
Liu [22] 2014 China R 2012-2013 RG 100 66.4 ± 5.7 22.7 ± 1.8 D, P, T
      LG 100 67.8 ± 4.8 23.1 ± 1.2
Huang [23] 2014 China R 2008-2014 RG 72 67.7 ± 15.1 24.1 ± 3.3 D, T
      LG 73 66 ± 13.5 24.2 ± 3.3
Zhou [24] 2014 China R 2010-2013 RG 120 54.7 ± 10.1 21.6 ± 2.8 D,P,T
      LG 394 55.6 ± 11.8 21.7 ± 2.6
Son T [25] 2014 Korea R 2003-2010 RG 51 55.3 ± 12.2 22.7 ± 2.9 T
      LG 58 58.8 ± 12.2 23.2 ± 3.3  
Han [26] 2015 Korea R 2008-2013 RG 68 50.6 ± 8.3 22.7 ± 2.4 PPG
      LG 68 49.8 ± 11.5 22.8 ± 3  
Lee [27] 2015 Korea R 2003-2010 RG 133 53.6 ± 13.2 23.2 ± 2.7 D
      LG 267 59.2 ± 11.7 23.7 ± 2.8  
Suda [28] 2016 Japan R 2009-2012 RG 88 63.5 ± 15.0 22.6 ± 4.6 D, T
      LG 438 64.0 ± 15.8 23.1 ± 6.4  
Shen [29] 2016 China R 2011-2014 RG 93 56.8 ± 10.5 24.3 ± 3.3 D, T
      LG 330 57.9 ± 11.5 23.8 ± 3.6  
Hong [30] 2016 Korea R 2008-2015 RG 232 53.7 ± 11.5 23.8 ± 3.3 D, P
      LG 232 55.0 ± 13.0 23.8 ± 3.0  
La n[31] 2017 China R 2014-2016 RG 196 59.0 ± 11.6 23.6 ± 4.6 D, P, T
      LG 673 59.0 ± 11.6 23.5 ± 4.5  
Zhang [32] 2018 China R 2011-2013 RG 70 58.0 ± 9.8 24.2 ± 3.4 D, P, T
      LG 70 56.9 ± 12.1 23.2 ± 2.9  
Li [33] 2018 China R 2013-2017 RG 112 55.6 ± 11.3 23.6 ± 2.9 D, T
      LG 112 56.1 ± 11.1 23.6 ± 3.0  
Obama [34] 2018 Japan R 2005-2009 RG 311 54.5 ± 12.6 23.6 ± 3.1 D, T
      LG 311 54.8 ± 12.0 23.2 ± 2.8  
Gao [35] 2019 China R 2011-2014 RG 163 60.27 ± 10.50 23.77 ± 3.11 D, T
      LG 163 59.88 ± 11.72 23.25 ± 3.26  
Sun [36] 2019 China R 2016-2018 RG 33 55.6 ± 10.3 22.38 ± 3.03 D, T
      LG 88 54.7 ± 10.9 22.59 ± 2.95  
Ye [37] 2020 China R 2014-2019 RG 285 57.1 ± 8.3 24.4 ± 2.3 D
      LG 285 57.0 ± 8.6 24.5 ± 2.2  
Kong [38] 2020 China R 2014-2017 RG 266 58.68 ± 10.54 24.23 ± 3.06 D, P, T
      LG 532 58.92 ± 9.82 24.25 ± 3.34  
Cui [39] 2020 China R 2016-2019 RG 187 59.0 ± 10.5 24.1 ± 3.0 D
      LG 334 57.2 ± 11.9 23.8 ± 3.4  
  1. R retrospectively collected data D distal gastrectomy, P proximal gastrectomy, T total gastrectomy, PPG pylorus-preserving gastrectomy, BMI body mass index, LG laparoscopic gastrectomy, RG robotic gastrectomy