Table 1 Pretreatment characteristics of patients and tumors

Age (years)

≥ 65

39

30 (76.9%)

9 (23.1%)

0.273

< 65

27

17 (63.0)

10 (37.0)

Sex

Male

51

38 (74.5)

13 (25.5)

0.335

Female

15

9 (60.0)

6 (40.0)

Tumor location

Upper/middle

46

33 (71.7)

13 (28.3)

1.000

Lower/abdominal

20

14 (70.0)

6 (30.0)

Histological type

Well/moderate

54

37 (68.5)

17 (31.5)

0.484

Poor/basaloid

12

10 (83.3)

2 (16.7)

Clinical T factor

cT1/cT2

22

20 (90.9)

2 (9.1)

0.019*

cT3/cT4

44

27 (61.4)

17 (38.6)

Clinical N factor

cN0

17

14 (82.4)

3 (17.6)

0.354

cN1–cN4

49

33 (67.3)

16 (32.7)

Clinical stage

II

18

18 (100)

0 (0)

< 0.001*

III/IVa

48

29 (60.4)

19 (39.6)