Table 4.

The relationship between clinical parameters and risk score.

Subgroup	Training set			Test set			Entire set
	High risk	Low risk	p value	High risk	Low risk	p value	High risk	Low risk	p value
Age (years)			0.492			0.626			0.407
<50	68	75		73	71		141	146
≥50	191	184		198	175		389	359
T stage			0.71			0.901			0.481
T1	65	71		68	65		133	136
T2	154	150		157	141		311	291
T3	30	32		34	32		64	64
T4	10	6		12	8		22	14
N stage			0.547			0.819			0.547
N0	111	126		129	118		240	244
N1	95	90		84	82		179	172
N2	37	30		30	26		67	56
N3	16	13		28	20		44	33
M stage			0.243			0.678			0.263
M0	251	255		264	241		515	496
M1	8	4		7	5		15	9
Clinical stage			0.378			0.868			0.525
I	40	46		43	44		83	90
II	149	158		156	135		305	293
III	62	51		65	62		127	113
IV	8	4		7	5		15	9
Vital status			<0.001			<0.001			<0.001
Living	195	242		224	230		419	472
Dead	64	17		47	16		111	33

Chi-square test was used.