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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