Table 4 Univariate and multivariate analysis of the risk factors for infra-pyloric (no. 6) lymph node metastasis

No. 1 (+)

1.015 (0.805–1.281)

0.898

No. 3 (+)

1.334 (1.145–1.555)

< 0.001

1.035 (0.869–1.011)

0.670

No. 4sb (+)

1.055 (0.628–1.773)

0.840

No. 4d (+)

1.666 (1.421–1.952)

< 0.001

1.193 (0.988–1.425)

0.055

No. 5 (+)

1.553 (1.232–1.959)

< 0.001

1.125 (0.931–1.384)

0.270

No. 7 (+)

1.240 (1.049–1.466)

0.013

0.977 (0.846–1.175)

0.975

No. 8a (+)

1.896 (1.584–2.269)

< 0.001

1.329 (1.055–1.674)

0.017

No. 9 (+)

1.566 (1.336–1.836)

< 0.001

1.250 (1.036–1.509)

0.022

No. 11p (+)

1.314 (1.080–1.599)

0.007

0.919 (0.754–1.120)

0.404

No. 12a (+)

1.249 (0.664–2.351)

0.491

Age (≥ 65 years)

0.892 (0.748–1.065)

0.209

Gender (female)

0.886 (0.747–1.051)

0.166

Tumor location (lower third)

1.388 (1.189–1.619)

< 0.001

1.278 (1.106–1.477)

0.001

Tumor size (≥ 5 cm)

1.141 (0.972–1.339)

0.108

Macroscopic type (type III-IV)

1.244 (1.048–1.475)

0.014

1.039 (0.892–1.211)

0.625

Histologic grade (≥ poor)

1.388 (1.189–1.619)

0.003

1.173 (0.980–1.405)

0.085

T stage (T4)

1.168 (0.992–1.374)

0.064

0.997 (0.843–1.179)

0.973

N stage (N2–3)*

1.514 (1.295–1.769)

< 0.001