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Table 2 Demographics of patients in the negative LNM and positive LNM groups

From: Clinicopathologic analysis of lymph node status in superficial esophageal squamous carcinoma

Variables

Group

p value

Negative LNM (group I)

Positive LNM (group II)

Number

411

87

 

Age (years)

 Mean ± SD

60.91 ± 7.19

59.91 ± 7.26

0.237

Gender

 Male

301

66

0.613

 Female

110

21

Tumor location

 Cervical

15

1

0.147

 Upper thoracic

71

19

 Middle thoracic

212

36

 Lower thoracic

113

31

Tumor size (cm)

 Mean ± SD

1.73 ± 0.97

2.31 ± 1.09

<0.05*

Pathologic appearancea

 Erosive type

85

14

0.175

 Ulcerative type

98

25

 Fungating type

61

23

 Other types

53

13

Differentiationb

 I

22

2

<0.05*

 I–II

67

4

 II

154

31

 II–III

52

34

 III

33

13

Depth of invasion

 m1

43

0

<0.05*

m1 to m2 vs m3 to sm3: p < 0.05

m1 to m3 vs sm1 to sm3: p < 0.05

m1 to m2 vs m3 to sm1 vs sm2 to sm3: p < 0.05

 m2

36

1

 m3

75

5

 sm1

72

16

 sm2

95

18

 sm3

90

47

Multicentric invasion

 Absent

404

83

0.095

 Present

7

4

Angiolymphatic invasion

 Absent

396

71

<0.05*

 Present

15

16

  1. SD standard deviation
  2. *Statistically significant
  3. aData available in 372 patients
  4. bData available in 412 patients