Table 3 Multivariate analysis of prognostic factors using the Cox proportional hazard model

T factor

(T2–T4/T1)

5.593

1.183

26.452

0.030

N factor

(N+/N−)

2.535

0.643

9.991

0.184

Ly factor

(Ly+/Ly−)

0.364

0.098

1.361

0.133

V factor

(V+/V−)

3.351

1.030

10.903

0.045

Histological type

(tub1, tub2/por, sig, others)

0.481

0.184

1.258

0.136

Tumor size

(> 34 mm/< 34 mm)

2.499

0.627

9.960

0.194

The number of positive lymph nodes

(> 1/≦1)

0.481

0.133

1.739

0.265