Table 3 Univariate analyses of prognostic factors associated with overall survival (OS)

Gender

female vs. male

31 vs. 58

0.587

Age

< 60 vs. ≥60, years

19 vs. 70

0.532

TNM stage

1/2 vs. 3/4

34 vs. 55

0.007

Tumor size

≥5 cm vs. < 5 cm

55 vs. 34

0.690

Differentiation

well or mod vs. poor

26 vs. 63

0.008

Resection margin

R0 vs. R1/2

56 vs. 33

0.008

Tumor number

single vs. multiple

58 vs. 31

0.385

Vascular invasion

with vs. without

42 vs. 47

0.227

Perineural invasion

with vs. without

33 vs. 56

0.736

Lymph node metastasis

with vs. without

38 vs. 51

0.001

Tumor recurrence

with vs. without

47 vs. 42

0.022

MAGE-A1

Positive vs. negative

26 vs. 63

0.116

MAGE-A3/4

Positive vs. negative

24 vs. 65

0.009

NY-ESO-1

Positive vs. negative

19 vs. 70

0.068

1 CTA positive

with vs. without

52 vs. 37

0.001

2 CTA positive

with vs. without

14 vs. 75

0.078

3 CTA positive

with vs. without

3 vs. 86

0.372