Table 4 The univariate and multivariate analyses of factors associated with LN metastasis in the S-MPESCC group

Age, n (%)

0.833

-

 < 60

8(42.1%)

14(45.2%)

 ≥ 60

11(57.9%)

17(54.8%)

Smoking, n (%)

 No

4(21.1%)

9(29.0%)

0.532

 Yes

15(78.9%)

22(71.0%)

Tobacco (Brinkman index)

400

300

0.504

Drinking Alcohol, n (%)

0.238

-

 No

3(15.8%)

11(35.5%)

 Yes

16(84.2%)

20(64.5%)

Total alcohol consumption, drinks

500

375

0.162

-

Location of primary cancer, n (%)

0.156

-

 Upper

2(10.5%)

1(3.2%)

 Middle

14(73.7%)

18(58.1%)

 Lower

3(15.8)

12(38.7%)

Operation, n (%)

1.498

 Ivor-Lewis

1(5.3%)

7(22.6%)

-

 Mckeown

18(94.7%)

24(77.4%)

Length of primary cancer, n (%)

0.079

0.220

 < 3.75 cm

14(73.7%)

15(48.4%)

  ≥ 3.75 cm

5(26.3%)

16(51.6%)

pT stage of primary cancer, n (%)

 < 0.001

0.023

 T1

10(52.6%)

2(6.5%)

 T2

5(26.3%)

4(12.9%)

 T3

2(10.5%)

13(41.9%)

 T4

2(10.5%)

12(38.7%)

pT stage of multiple cancer, n (%)

0.042

0.138

 T1-4

11(57.9%)

26(83.9%)

 Tis

8(42.1%)

5(16.1%)

Dissection number of lymph nodes, n (%)

0.109

0.038

 < 24

13(68.4%)

14(45.2%)

 ≥ 24

6(31.6%)

17(54.8%)