Table 5 Correlation between the number of cytotoxic T cells and clinicopathological characteristics of patients

Tumor stage:

   I-II

23

32

0.107

24

31

0.228

27

28

0.840

   III-IV

26

18

25

19

23

21

Histology

   Adenocarcinoma

24

21

0.547

23

22

0.841

24

21

0.688

   Non-adenocarcinoma

25

29

26

28

26

28

Tumor grade

   Well to moderate differentiation

26

24

0.248

29

21

0.040

28

22

0.248

   Poor differentiation

11

19

10

20

12

18

Lymph node metastasis

   No

25

34

0.103

27

32

0.416

29

30

0.838

   Yes

24

16

22

18

21

19