Table 1 The clinical characteristics of GC patients with gastrectomy

Total

158

100

Age (years, mean ± standard deviation [SD])

59.06 ± 11.63

Gender

 Male

104

66

 Female

54

34

BMI (kg/m², mean, SD)

22.20 ± 3.22

Tumor location

 Upper

45

28

 Middle

33

21

 Low

74

47

 Across

6

4

Lauren Type

 Intestinal

54

34

 Diffuse

75

16

 Mix

26

47

 Missing

3

2

Tumor Differentiation

 High

7

4

 Moderate

30

19

 Poor

119

75

 Missing

2

1

Depth of tumor invasion

 pT1

21

13

 pT2

28

18

 pT3

36

23

 pT4

73

46

Lymph node metastasis

 pN0

52

33

 pN1

23

15

 pN2

24

15

 pN3

59

37

Distant metastasis

 M0

143

91

 M1

15

9

Postoperative chemotherapy

 Yes

98

62

 No

60

38

pTNM stage

 I

36

23

 II

36

23

 III

71

45

 IV

15

9

Perineural invasion (S-100)

 Positive

101

64

 Negative

52

33

 Missing

5

3

Lymphatic invasion (D2-40)

 Positive

81

51

 Negative

72

46

 Missing

5

3

Venous invasion (CD31)

 Positive

68

43

 Negative

85

54

 Missing

5

3

HER2

 0

83

53

 1 + 

41

26

 2 + 

22

14

 3 + 

8

5

 Missing

4

3

Preoperative CEA (ug/L)

 ≤ 5

130

82

 > 5

24

15

 Missing

4

3

Preoperative CA199 (U/ml)

 ≤ 37

139

88

 > 37

15

9

 Missing

4

3