Table 1 Clinicopathologic features of the included patients

Age

Years, mean ± SD

55.0 ± 12.5

Gender

Male/female

81 (66.9)/40 (33.1)

Tumor Location

U/M/L

24 (19.8)/24 (19.8)/73 (60.3)

Tumor size

cm, mean ± SD

5.0 ± 2.9

Histologic grade

Moderate/poor

19 (15.7)/102 (84.3)

Macroscopic type

Type 0-II/type III-IV

84 (69.4)/37 (30.6)

Operation type

Open/laparoscopic

81 (66.9)/40 (33.1)

Resection patterns

DG/TG

66 (54.5)/55 (45.55)

Operation time

min, mean ± SD

248.5 ± 44.0

Blood loss

ml, mean ± SD

154.8 ± 97.9

T stage

T1/T2/T3/T4

29 (24.0)/12 (9.9)/7 (5.8)/73 (60.3)

N stage

N0/N1/N2/N3

39 (32.2)/22 (18.2)/13 (10.7)/47 (38.8)

M stage

M0/M1

110 (90.9)/11 (9.1)

TNM stage

I/II/III/IV

31 (25.6)/21 (17.4)/46 (38.0)/11 (9.1)

Chemotherapy

Yes/no

74 (61.2)/47 (38.8)

Positive lymph nodes

Numbers, mean ± SD

6.1 ± 7.7

Examined lymph nodes

Numbers, mean ± SD

35.1 ± 14.2