Table 3 Univariate and multivariate analysis for overall survival

Age

0.991

(0.951–1.032)

0.659

Female

Ref

Male

2.152

(0.974–4.751)

0.058

Colon primary

Ref

Rectal primary

1.268

(0.436–3.689)

0.663

Classic adenocarcinoma

Ref

Mucinous adenocarcinoma

1.037

(0.415–2.589)

0.938

Grade I (histology)

Ref

Grade II (histology)

0.845

(0.331–2.156)

0.725

Grade III (histology)

0.889

(0.309–2.562)

0.828

Presenting stage I–III

Ref

Presenting stage IV

1.116

(0.367–3.395)

0.846

Metachronous

Ref

Synchronous

1.028

(0.471–2.245)

0.945

Peri-op chemo

0.5350

(0.159–1.8)

0.788

Intra-op IV chemo

0.8957

(0.402–1.997)

0.697

PCI (continuous)

1.134

(1.074–1.198)

< 0.001

1.178

(1.083–1.281)

0.0001

Operative time (hours)

1.198

(1.012–1.417)

0.0355

0.772

(0.5493–1.086)

0.1375

Blood loss (100 ml)

1.039

(1.005–1.076)

0.0263

1.004

(0.947–1.064)

0.889

No complications

Ref

Grade I (complication)

2.0827

(0.704–6.247)

0.187

2.173

(0.713–6.624)

0.172

Grade II (complication)

1.692

(0.422–6.775)

0.457

3.292

(0.749–14.48)

0.114

Grade III (complication)

7.242

(2.229–24.73)

0.0012

6.324

(1.383–28.919)

0.0174

Grade IV (complication)

6.852

(1.905–52.42)

0.003

5.588

(1.256–24.865)

0.0238