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Table 1 Characteristics of the studies included in this meta-analysis

From: High ligation of the inferior mesenteric artery during sigmoid colon and rectal cancer surgery increases the risk of anastomotic leakage: a meta-analysis

Study

Country

Year

Diagnosis

Type of surgery

Surgical treatment of IMA (no. of patients)

Type of study

High ligation

Low ligation

Corder AP

UK

1992

Rectal cancer

TME

91

52

Retrospective cohort

Hall NR

UK

1995

Left-side colorectal cancer

Curative resection

30

32

Retrospective cohort

Komen N

Netherlands

2011

Rectal cancer

TME

16

17

Retrospective cohort

Sekimoto M

Japan

2011

Sigmoid and rectal cancer

Laparoscopic resection

27

45

Retrospective cohort

Rutegard M

Sweden

2012

Rectal cancer

AR

818

1101

Retrospective cohort

Hinoi T

Japan

2013

Rectal cancer

Laparoscopic resection

304

584

Retrospective cohort

Yamamoto M

Japan

2014

Sigmoid and rectal cancer

Laparoscopic resection

91

120

Retrospective cohort

Bostrm P

Sweden

2015

Rectal cancer

AR

334

388

Retrospective cohort

Matsuda K

Japan

2015

Rectal cancer

AR

51

49

RCT

Huang J

China

2016

Rectal cancer

Laparoscopic resection

87

29

Retrospective cohort

Niu JW

China

2016

Rectal cancer

Laparoscopic AR

45

52

RCT

Rutegard M

Japan

2016

Rectal cancer

AR

5

18

Retrospective cohort

Yasuda K

Japan

2016

Colorectal cancer

Curative resection

42

147

Retrospective cohort

Zhang LY

China

2016

Rectal cancer

Laparoscopic resection

42

61

Retrospective cohort

Zhang YD

China

2016

Rectal cancer

Laparoscopic LAR

84

132

Retrospective cohort

Guo YC

China

2017

Rectal cancer

Radical resection

29

28

RCT

Mihara Y

Japan

2017

Colorectal cancer

NA

117

745

Retrospective cohort

Zhou JM

China

2018

Rectal cancer

Laparoscopic resection

52

52

RCT

  1. TME total mesorectal excision, AR anterior resection, LAR low anterior resection, NA not available, RCT randomized clinical trial