Table 6 Multivariate Cox proportional hazards analysis of overall survival

Tumor type

 Type E (AD) (n = 6)

1.0

 Type E (SQ) (n = 12)

0.224

0.062 – 0.911

0.038*

 Type Ge (n = 27)

0.162

0.048 – 0.643

0.012*

 Type G (n = 47)

0.219

0.069 – 0.839

0.029*

Lymphatic invasion

 L0 (n = 32)

1.0

 L1 (n = 60)

4.575

0.940 – 25.80

0.060

Venous invasion

 V0 (n = 32)

1.0

 V1–2 (n = 60)

0.966

0.196 – 5.170

0.967

Depth of tumor invasion

 pT1–2 (n = 44)

1.0

 pT3–4 (n = 48)

2.937

1.168 – 8.698

0.021*

Lymph node metastasis

 pN0 (n = 47)

1.0

 pN1–3 (n = 45)

1.460

0.463 – 5.607

0.537

Distant metastasis

 M0 (n = 72)

1.0

 M1 (n = 20)

1.097

0.428 – 2.794

0.846