Table 1 Associations between pulmonary metastasis and clinicopathologic parameters in patients with esophageal cancer with and without resection

Number

14

30

Age

60.3 ± 6.2

59.4 ± 9.7

0.83

Clinical T classification

T1/2

0

3

0.23

T3/4

14

27

Clinical N classification

N0

2

2

0.42

 N positive

12

28

Tumor grade

Grade 1

1

3

0.95

Grade 2

11

23

Grade 3

2

4

Primary tumor location

Cervical

3

0

0.017*

Upper

2

12

Middle

7

12

Lower

2

10

Performance Status

0

14

25

0.268

1

0

4

2

0

1

Lung Metastasis Number

1

8

8

0.352

2

2

5

3

1

1

4

1

1

>=5

2

15