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Table 2 Demographics of patients in the Negative lymph Node Metastases (LNM) and Positive LNM groups

From: A prediction model for lymph node metastases using pathologic features in patients intraoperatively diagnosed as stage I non-small cell lung cancer

Variables

Group

P value

Negative LNM

Positive LNM

Number

215

69

 

Age (years)

  

0.118

 Mean ± SD

61.27 ± 9.38

59.28 ± 8.49

 

Gender

  

0.997

 Male

109

35

 

 Female

106

34

 

Pathology

  

0.176

 Squamous cell carcinoma

24

12

 

 Adenocarcinoma

191

57

 

Tumor location

  

0.368

 Right Upper Lobe

62

20

 

 Right Middle Lobe

14

2

 

 Right Lower Lobe

28

11

 

 Left Upper Lobe

63

14

 

 Left Lower Lobe

34

17

 

 Mixed lobes

14

5

 

Differentiation

  

<0.001*

 I

80

6

 

 II

119

57

 

 III

16

6

 

Tumor size (cm)

  

<0.001

 Mean ± SD

2.28 ± 0.95

2.92 ± 0.87

 

Pleura invasion

  

0.033*

 Absent

173

47

 

 Present

42

22

 

Bronchus invasion

  

<0.001*

 Absent

196

51

 

 Present

19

18

 

Multicentric invasion

 

1 (Fish)

 Absent

200

64

 

 Present

15

5

 

Angiolymphatic invasion

 

0.263 (Fish)

 Absent

209

65

 

 Present

6

4

 

Neural invasion

  

1.0 (Fish)

 Absent

214

69

 

 Present

1

0

 
  1. SD standard deviation
  2. *P < 0.05