Table 1 Basic information of the included articles and patients

1

Mohammed A. Aldriweesh

2020

Saudi Arabia

36.87 ± 11.44

189/301

46.15 ± 6.94

123.31 ± 21.89

2

SG RYGB

8

2

Faisal A. Alsaif

2019

Saudi Arabia

31.1 ± 14(with CL)

34.7 ± 11.9(without CL)

313/414

46 ± 8.7(with CL)

45 ± 10.3(without CL)

123.1 ± 28.4

2

LSG

7

3

Ainhoa Andre’s-Imaz

2020

Spain

44.92(all)

40.83 ± 12.57(with CL)

44.35 ± 11.9(without CL)

88/192

46.24 ± 7.1(with CL)

46.02 ± 7.73(without CL)

\

6.47(mean)

SG RYGB

8

4

Muriel Coupaye, M.D.

2014

France

40.4 ± 11.9 (with CL)

41.9 ± 10.8(without CL)

15/145

46.2 ± 7.5 (with CL)

44.3 ± 5.3(without CL)

125.1 ± 22.5 (with CL)

119.7 ± 17.3(without CL)

4

SG RYGB

8

5

Hernán M. Guzmán

2019

Chile

37.8 ± 10.5

80/96

37.5

\

1

SG GB RYGB

7

6

Sylke Haal

2022

Netherlands

44.8 ± 11.3

150/519

40.1 ± 4.8

115.7 ± 18.3

2

SG RYGB

8

7

Sylke Haal

2019

Netherlands

39.8 ± 10.6(with CL)

43.8 ± 10.5(without CL)

109/590

43.4 ± 5.1 (with CL)

43.4 ± 5.0 (without CL)

\

2

RYGB

8

8

Rosalie M. Kiewiet, MD

2006

Netherlands

43.5 ± 11.3(with CL)

41.4 ± 8.0(without CL)

10/88

45.0 ± 4.6(with CL)

44.0 ± 6.1(without CL)

131.8 ± 17.0(with CL)

129.4 ± 17.7(without CL)

4.68(mean)

AGB

6

9

Mehmet Celal Kızılkaya

2020

Turkey

36.43 ± 9.52(all)

36.28 ± 9.58(with CL)

36.87 ± 9.44(without CL)

34/151

44.16 ± 5.09(all)

45.31 ± 4.77(with CL)

40.76 ± 4.45(without CL)

\

2

SG RYGB

6

10

Vicky Ka Ming Li

2009

USA

39.9(with CL)

43.0(without CL)

142/444

46.5(with CL)

47.7(without CL)

\

2

LSG LAG RYGB

7

11

Wuttiporn Manatsathit, MD

2016

USA

44.9 ± 12.0 (with CL)

44.0 ± 12.06 (without CL)

20/76

49.5 ± 9.6 (with CL)

48.6 ± 6.2 (without CL)

136.98 ± 30.62(with CL)

133.81 ± 26.67 (without CL)

2

SG RYGB

7

12

Andreas Melmer

2015

Austria

55.3 ± 10.5

28/91

\

118.2 ± 22.9 (with CL)

119.9 ± 14.9 (without CL)

10.42(mean)

SG LAGB

7

13

Rena C. Moon, M.D.

2013

USA

44.9 ± 12.0 (LSG)

44.0 ± 12.06 (LRYGB)

120/362

46.0 ± 7.9(LSG) 47.1 ± 7.7 (LRYGB)

\

2

LSG LRYGB

7

14

Rachid Nagem

2012

Brazil

40.6 (with CL)

42.2 (without CL)

4/34

46.2 (with CL) 48.9 (without CL)

\

3

RYGB

7

15

Sabri Özdaş

2019

Turkey

37.1 ± 10.8(all)

42.7 ± 10.3(with CL)

35.6 ± 10.7(without CL)

35/95

46.2 ± 3.8(all) 46.1 ± 3.5(with CL) 45.6 ± 3.7(without CL)

\

1

LSG

7

16

Sidney Pinheiro-Júnior

2012

Brazil

46.6 ± 11.2 (with CL)

40.6 ± 9.7 (without CL)

41/179

50.2 ± 12.1 (with CL) 47.9 ± 14.2 (without CL)

\

0.67(mean)

RYGB

7

17

M. Plecka Östlund

2012

Sweden

40

3436/10007

\

\

7.39(mean)

GB

8

18

Midhat Abu Sneineh

2020

Israel

48 ± 19

123/436

\

\

1

LSG LAG RYGB

7

19

Victor B. Tsirline, M.D.

2014

USA

39.9 ± 9.3 (with CL)

42.8 ± 9.9 (without CL)

232/1164

45.2 ± 5.3 (with CL) 44.6 ± 5.5(without CL)

\

4

LSG LAG RYGB

7