Table 2 Univariate analysis in regard to overall survival according to clinicopathological features for 56 patients with EASC

Sex

0.282

 Male

43

71.8

42.3

21.9

 Female

13

84.6

59.2

29.2

Age (year)

0.271

 ≤ 60

27

77.6

49.7

36.1

 > 60

29

71.8

42.8

22.8

Tumor location

0.918

 Upper third

9

100.0

62.5

31.3

 Middle third

37

70.3

45.4

30.3

 Lower third

10

70.0

35.0

-

Tumor length

0.036

 ≤ 4 cm

26

84.6

56.1

41.6

 > 4 cm

30

65.5

36.4

18.2

Thoracotomy

0.102

 Left thoracotomy

37

67.6

35.1

26.4

 Right thoracotomy

19

88.2

70.1

31.5

Resection margin

0.091

 Radical

49

79.2

48.6

32.0

 Palliative

7

42.9

28.6

14.3

pT category

0.434

 pT1-T2

9

87.5

54.7

18.2

 pT3-T4

47

72.2

43.7

30.7

pN category

0.082

 pN0

24

83.3

54.2

39.4

 pN1-N3

32

67.7

40.1

21.4

Adjuvant radiotherapy

0.667

 Yes

14

78.6

50.0

28.6

 No

42

73.2

44.8

30.6

Adjuvant chemotherapy

0.153

 Yes

8

87.5

87.5

58.3

 No

48

72.3

38.9

25.0