Table 1 Patient characteristics before surgery

Gender, Male

9(64.3%)

7(63.6)

1.000

Age(years)

69.36 ± 5.92

66.91 ± 7.89

0.384

Admission weight (kg)

62.14 ± 10.26

63.00 ± 10.92

0.842

Admission BMI (kg/m²)

22.29 ± 2.97

21.82 ± 3.06

0.703

Diabetes

6(42.9%)

4(36.4%)

1.000

KPS scores

92.86 ± 4.69

92.73 ± 4.67

0.946

Albumin levels (g/L)

44.50 ± 5.37

46.64 ± 5.55

0.341

Absolute lymphocyte counts (10⁹/L)

1.96 ± 0.62

1.87 ± 0.60

0.732

Alanine aminotransferase (IU/L)

48.50 ± 9.72

42.18 ± 8.16

0.097

Aspartate aminotransferase (IU/L)

30.93 ± 9.80

37.18 ± 10.32

0.135

Blood urea nitrogen (mmol/L)

6.15 ± 1.71

6.30 ± 1.35

0.814

Creatinine (umol/L)

77.03 ± 10.28

82.14 ± 11.50

0.254

Tumor location, n(%)

Middle section

7(50%)

8(72.8%)

0.284

Lower section

5(35.8%)

1(9%)

Middle and lower sections

2(14.3%)

2(18.2%)

Tumor stage, n(%)

Stage I

4(28.6%)

2(18.2%)

0.200

Stage II

4(28.6%)

7(63.6%)

Stage III

6(42.8%)

2(18.2%)