Table 6 Multivariate analysis of relapse-free survival

Sex

0.6482

Female

1

Male

0.84

0.41–1.79

Age

1.04

1.00–1.08

0.0265^†

Tumor location

0.1287

Sigmoid

1

Rectosigmoid

1.73

0.59–4.91

Upper rectum

3

1.21–7.90

Lower rectum

1.92

0.64–5.66

T stage

0.0101^†

T1

1

T2

1.16 × 10⁹

0.19

T3

7.36 × 10⁹

0.79

T4

5.67 × 10⁹

1.22

N stage

0.0223^†

N0

1

N1

1.56

0.71–3.52

N2

4.09

1.53–10.69

Lymphatic invasion

0.905

Absent

1

Present

0.92

0.26–4.32

Venous invasion

0.1857

Absent

1

Present

1.59

0.80–3.20

Operation

0.9103

High tie

1

Low tie with LND

0.95

0.24–2.30