Characteristic

No. of

Patients

SPARC expression (stroma)

χ2 test

negative

positive

Sex

Male

86

31

55

P = 0.832

Female

64

22

42

Age (years)

<60

72

28

44

P = 0.381

≥60

78

25

53

Tumor position

head and neck

111

40

71

P = 0.761

body and tail

39

13

26

Differentiation

Well

5

5

0

P = 0.008*

Moderately

96

33

63

Poorly

49

15

34

TNM stage

I + II

89

32

57

P = 0.847

III + IV

61

21

40

perineural invasion

Absent

38

15

23

P = 0.537

Present

112

38

74

Vascular invasion

Absent

133

52

81

P = 0.006*

Present

17

1

16

LN metastasis

Absent

90

32

58

P = 0.994

Present

60

21

39