Table 3 The Cox regression coefficients of the three models of the SEER training set

Model 1

 Age

0.0210

7th AJCC T stage

 T1

Reference

 T2

0.4343

 T3

1.0923

 T4

1.1331

 7th AJCC N stage

1.0257

 7th AJCC M stage

0.6781

Model 2

 Age

0.0176

7th AJCC stage group

 I

Reference

 II

0.1788

 III

0.8649

 IV

1.3601

Model 3

 Age

0.0185

ENSAT stage group

 I

Reference

 II

0.1750

 III

0.9343

 IV

1.5587