Table 5 Multivariate analysis of overall survival

Sex

0.6394

Female

1

Male

1.2

0.56–2.74

Age

1.06

1.02–1.11

0.0071^†

Tumor location

0.4685

Sigmoid

1

Rectosigmoid

0.99

0.33–2.71

Upper rectum

1.26

0.49–3.23

Lower rectum

2.27

0.77–6.56

T stage

0.0681

T1

1

T2

0.43

0.05–9.24

T3

1.87

0.31–36.19

T4

1.69

0.27–33.31

N stage

0.5535

N0

1

N1

1.52

0.68–3.44

N2

1.48

0.47–4.24

Lymphatic invasion

0.6929

Absent

1

Present

0.76

0.22–3.54

Venous invasion

0.3709

Absent

1

Present

1.41

0.56–2.99

Operation

0.3882

High tie

1

Low tie with LND

1.56

0.59–4.96