Table 1 Comparison of the clinicopathological characteristics

Age (years)

57.3 ± 12.5

59.4 ± 11.1

0.18

Gender

Male

98

73

0.99

Female

47

35

BMI index (kg/m²)

23.1 ± 4.2

23.5 ± 3.5

0.42

Comorbidity

Absence

97

76

0.56

Presence

48

32

ASA classification

I

80

65

0.60

II

58

37

III

7

6

Tumor size (cm)

4.3 ± 2.0

4.0 ± 1.8

0.23

Tumor location

Middle

36

33

0.31

Upper

109

75

Histology

Differentiated

84

67

0.51

Undifferentiated

61

41

TNM stage

IA/IB

54/28

28/25

0.45

IIA/IIB

18/9

14/13

IIIA/IIIB/IIIC

12/10/14

13/7/8