Table 3 Univariate and multivariate Cox regression for clinical variables and the prognostic risk model in international validation group

Age

1.021 (1.003–1.039)

0.022

1.015 (0.995–1.035)

0.148

Gender

0.837 (0.496–1.411)

0.504

Race

1.102 (0.15–8.089)

0.924

Pathological stage

1.406 (1.023–1.932)

0.035

0.745 (0.43–1.292)

0.295

Pathological M

47.619 (10.351–219.066)

< 0.001

21.963 (4.23–114.032)

< 0.001

Pathological N

1.407 (1.081–1.831)

0.011

1.68 (1.114–2.533)

0.013

Pathological T

1.319 (1.1–1.582)

0.003

1.324 (1.058–1.658)

0.014

Risk score

1.699 (1.118–2.582)

0.013

1.351 (1.112–1.631)

0.027