Table 3 The multivariable analysis of patients

Pre-operative CEA

(<5 ng/m L, ≥ 5 ng/m L)

1.271

0.420

9.136

0.003

1.563,8.120

DFS

Number of lymph nodes

(<15, ≥ 15)

−1.774

0.553

10.280

0.001

0.057,0.502

Perirectal fat infiltration

(Yes/No)

0.860

0.431

3.981

0.046

1.015,5.501

DFS

Number of lymph nodes

−1.600

0.787

4.129

0.042

0.043,0.945

inspected (<15, ≥ 15)

Perirectal fat infiltration

1.617

0.700

5.338

0.021

1.278,19.865

(Yes/No)