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Table 2 Results of univariate log-rank analysis of prognostic factors for overall survival and disease-free survival in patients diagnosed with esophageal cancer with pulmonary metastasis

From: Long-term survival after pulmonary metastasectomy in patients with esophageal squamous cell carcinoma with lung metastasis

Factors

No. of patients

Overall survival (OS)

Progression-free survival (DFS)

1-year OS rate (%)

p-value

1-year PFS rate (%)

p-value

Age

     

>ā€‰60

19

67

0.43

45

0.93

ā‰¦ā€‰60

25

62

 

35

 

Clinical T classification

     

T1/2

3

66

0.83

66%

0.46

T3/4

41

64

 

37%

 

Clinical N classification

     

N0

4

67

0.90

25%

0.60

 N positive

40

64

 

42%

 

Tumor grade

     

Grade 1

4

100

0.18

75

0.019*

Grade 2

34

62

 

41

 

Grade 3

6

50

 

0

 

Primary tumor location

     

Cervical

3

100

0.11

0

0.18

Upper

11

40

 

18

 

Middle

18

71

 

49

 

Lower

12

66

 

50

 

Resection or Systemic Treatment

     

Resection

14

100

<ā€‰0.0001*

48

0.038*

Only Systemic Treatment

30

49

 

33

 

Performance Status

     

0

39

70

<ā€‰0.0001*

45

0.0024*

1

4

25

 

0

 

2

1

0

 

0

 

Lung Metastasis Number

     

1

16

75

0.061

35

0.6032

2

7

67

 

40

 

3

2

100

 

100

 

4

2

100

 

100

 

>=5

17

44

 

34

 
  1. Tā€‰=ā€‰the extent of the tumor, Nā€‰=ā€‰the extent of spread to the lymph nodes,*=Statistically significant. х2 test or Fisherā€™s exact test was used for statistical analysis. *=Statistically significant