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Table 1 Baseline characteristics of the enrolled 11 clinical cohort studies

From: Influences of laparoscopic-assisted gastrectomy and open gastrectomy on serum interleukin-6 levels in patients with gastric cancer among Asian populations: a systematic review

First author

Year

Country

Sample Size

Gender (M/F)

Age (years)

Method

LAG

OG

LAG

OG

LAG

OG

Choi YB [17]

2002

Japan

10

10

7/3

9/1

58.7 (33 ~ 80)

60.4 (25 ~ 78)

ELISA

Hayashi H [18]

2005

Japan

14

14

9/5

13/1

56 (47 ~ 70)

62 (49 ~ 75)

ELISA

Jung IK [34]

2008

Korea

10

10

4/6

9/1

54.8 ± 16.1

62.9 ± 6.6

ELISA

Shao WX [30]

2009

China

47

47

31/16

30/17

57.7 (26 ~ 77)

57.0 (28 ~ 76)

ELISA

Chen XZ [5]

2011

China

15

15

12/3

12/3

52.3 ± 12.2

54.3 ± 12.3

ELISA

Park JY [35]

2012

Korea

120

30

65/55

18/12

55 (45 ~ 64)

50 (45 ~ 54)

ELISA

Huang X [29]

2012

China

30

30

21/9

23/7

56

58

ELISA

Zhou B [33]

2012

China

45

45

24/21

25/20

51.8 ± 10.6

50.1 ± 11.4

ELISA

Chen Z [28]

2013

China

36

36

19/17

21/15

52.6 ± 4.2

53.2 ± 4.8

ELISA

Xia YB [31]

2013

China

55

59

33/22

39/20

54.0 ± 3.2

52.7 ± 1.8

ELISA

Yin ZW [32]

2014

China

45

44

29/16

33/11

55.9 ± 8.5

56.1 ± 7.9

ELISA

  1. M male; F female; ELISA enzyme-linked immune sorbent assay; LAG laparoscopic-assisted gastrectomy; OG open gastrectomy.