Table 6 The univariate and multivariate analyses on prognostic factors in the S-MPESCC group

Age

0.327

-

-

  < 60

  ≥ 60

Smoking

0.020

0.017

  No

Ref

  Yes

8.561 (1.475–49.704)

Tobacco (Brinkman index)

0.008

0.610

Drinking Alcohol

0.137

-

-

  No

  Yes

Total alcohol consumption

0.307

-

-

Location of primary cancer

0.045

0.521

  Upper

Ref

  Middle

1.008 (0.102–9.944)

0.995

  Lower

1.695(0.148–19.476)

0.672

Operation

0.286

-

-

  Ivor-Lewis

  Mckeown

Length of primary cancer

0.205

-

-

  < 3.75 cm

  ≥ 3.75 cm

pT stage of primary cancer

0.001

0.045

  T1-2

Ref

  T3-4

3.968(1.031–15.268)

pT stage of multiple cancer

0.018

0.153

  T1-4

Ref

  Tis

0.293(0.054–1.580)

pN stage

0.028

0.906

  N-

Ref

  N + 

1.081(0.295–3.964)

Dissection number of lymph nodes

0.137

-

-

 < 24

 ≥ 24