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Table 2 Data extracted from studies included

From: Prognostic and clinicopathological value of Slug protein expression in breast cancer: a systematic review and meta-analysis

Study

Slug protein

Age (≤ 50/> 50)

Tumor size (≤ 2 cm/> 2 cm)

H grade (G1–G2/G3)

LN (P/N)

TNM stage (I–II/III–IV)

ER (P/N)

PR (P/N)

HER-2 (P/N)

HR

Liu 2013 [10]

High

45/33

45/33

21/57

57/21

43/35

NR

NR

NR

OS/DFS

Low

30/25

39/6

30/15

15/30

37/8

Wan 2017 [14]

High

55/77

71/61

90/42

62/70

NR

76/56

50/82

47/85

OS/DFS

Low

19/23

21/21

34/8

11/31

26/16

10/ 32

19/23

Wu 2019 [22]

High

17/16

12/21

24/9

17/16

NR

NR

NR

NR

OS/DFS

Low

44/61

33/72

81/24

25/80

Gu 2019 [23]

High

NR

40/18

44/14

21/37

47/11

44/14

29/29

17/40

OS/DFS

Low

32/18

41/9

20/30

43/7

43/7

35/15

21/23

Prasad 2009 [24]

High

22/11

NR

23/10

43/22

NR

NR

NR

NR

NR

Low

40/25

33/32

19/14

Cao 2015 [25]

High

NR

NR

43/29

39/33

57/15

31/41

34/38

52/20

NR

Low

93/25

50/78

114/14

75/53

71/57

94/34

Wu 2012 [26]

High

NR

NR

NR

NR

NR

NR

NR

NR

OS

Low

Ito 2015 [27]

High

8/15

5/18

NR

NR

NR

17/6

NR

NR

DFS

Low

7/17

8/16

16/8

  1. The threshold of high or low expression of Slug protein was defined by each study. For specific methods, please refer to Table 1
  2. H histological, G grade, P positive, N negative, NR no report, LN lymph nodes