Table 4 Multivariate Cox regression analysis of prognostic factors

Sex

0.131

2.076

0.805–5.355

Age

0.186

1.022

0.990–1.056

Tumor diameter

0.434

1.270

0.698–2.312

Distance to anal margin

0.410

0.862

0.607–1.226

Width of tumor basal part

0.216

0.033

0.000–7.369

Gross type

0.610

1.251

0.529–2.956

Pathological type

0.305

1.304

0.785–2.165

T stage

0.042

2.622

1.037–6.625

Adjuvant radiotherapy

0.163

0.480

0.172–1.345

Recurrence or metastasis

<0.001

3.025

1.985–4.611