Table 2 Univariate and multivariate analyses of risk factors of progression-free survival

Serum PRTN3 (ng/ml)

>21.6

2.173

1.269

3.723

0.005

2.082

1.188

3.647

0.010

Age (years)

>65

0.921

0.545

1.555

0.757

Sex

Male/female

1.162

1.162

1.940

0.565

WBC count (/µl)

>8600

1.707

0.922

3.162

0.089

1.807

0.964

3.388

0.065

Neutrophil count (/µl)

>4920

1.477

0.884

2.470

0.137

CEA level (ng/ml)

>6.0

0.893

0.354

2.254

0.812

CA19-9 level (U/ml)

>37

1.517

0.889

2.588

0.127

Tumor location

Right/left

1.263

0.756

2.109

0.372

T category

1.039

0.678

1.638

0.865

N category

1.360

1.050

1.756

0.020

1.222

0.931

1.604

0.148

Metastasis

a/b/c

1.200

0.808

1.725

0.355

Operation (radical resection)

R0, 1/R2, unresected

0.619

0.369

1.037

0.068

0.589

0.341

1.018

0.058