Table 2.

The COX analyses of factors associated with overall survival in the training set.

	Cox regression		Log-rank (Mantel–Cox)
Variable	HR (95% CI)	P	χ 2	P
Stage I
T1LNR1	1
T1LNR2	1.052 (0.450–2.459)	0.906	0.010	0.921
Stage IIA
T1LNR3	1.273 (0.752–2.155)	0.369	0.180	0.671
T2LNR1	1.326 (0.639–2.758)	0.449	0.011	0.917
T2LNR2	1.443 (0.736–2.829)	0.286	0.050	0.823
T2LNR3	1.587 (0.462–5.448)	0.463	0.050	0.823
T1LNR4	1.935 (0.757–4.945)	0.168	0.069	0.792
T3LNR1	1.979 (0.952–4.115)	0.068	0.001	0.978
Stage IIB
T2LNR4	2.573 (1.529–4.330)	<0.001	0.870	0.351
Stage IIC
T3LNR2	2.798 (1.623–4.823)	<0.001	0.374	0.541
T4a LNR1	2.847 (1.639–4.948)	<0.001	0.023	0.880
T1LNR5	2.949 (1.764–4.930)	<0.001	0.056	0.813
Stage IIIA
T3LNR3	3.057 (1.733–5.392)	<0.001	0.142	0.706
T2LNR5	3.111 (0.906–10.680)	0.071	0.005	0.943
T4b LNR1	3.252 (1.437–7.361)	0.005	0.008	0.930
T4a LNR2	3.464 (1.571–7.635)	0.002	0.021	0.884
T3LNR4	3.807 (1.273–11.391)	0.017	0.015	0.902
Stage IIIB
T3LNR5	5.166 (2.886–9.248)	<0.001	0.260	0.610
T4a LNR3	5.874 (1.962–17.589)	0.002	0.014	0.907
T4a LNR4	6.381 (2.334–17.442)	<0.001	0.012	0.912
T4b LNR2	6.617 (2.719–16.102)	<0.001	0.005	0.943
Stage IIIC
T4b LNR3	7.307 (3.951–13.514)	<0.001	0.207	0.649
T4a LNR5	8.792 (2.559–30.202)	0.001	0.092	0.762
T4b LNR4	9.773 (3.573–26.727)	<0.001	0.099	0.753
T4b LNR5	11.967 (4.669–30.721)	<0.001	0.331	0.565

LNR, lymph node ratio.