Table 1 Comparison of clinicopathological factors and surgical data between the D2 and D2 plus group

Gender

0.564

 Male

25

23

 Female

7

9

Age (years)

0.522

 > 50

27

25

 ≤ 50

5

7

Tumor location

0.554

 Lower third

30

31

 Middle third

2

1

Histological type

0.688

 Adenocarcinoma

  Poor differentiation

13

15

  Well-moderate differentiation

16

14

 Signet ring cell carcinoma

2

3

 Mucinous adenocarcinoma

1

0

TNM stage

0.157

 II

11

6

 III

21

26

Reconstruction

0.069

 Billroth I

22

14

 Billroth II

8

17

 Roux-en-Y

2

1

Operation time (min)

163.3 ± 59.1

179.6 ± 60.7

0.351

Blood loss (ml)

158.7 ± 70.4

181.3 ± 86.0

0.436

Number of LNs

34.8 ± 11.4

39.4 ± 12.0

0.217

Positive LNs

4.5 ± 8.5

6.5 ± 7.9

0.509

Postoperative complications

0.785

 Pulmonary infection

1

1

 Wound infection

0

2

 Anastomotic leakage

1

1

 Pancreatic fistula

0

1

 Ascites

1

4

Hospital stay (days)

9.8 ± 2.5

10.5 ± 1.7

0.768