Variables	Univariate analysis			Multivariate analysis
	HR	95% CI	P value	HR	95% CI	P value
Stage	1.831	(1.010-3.321)	0.046	2.684	(0.245-29.452)	0.419
T	1.122	(0.604-2.085)	0.715	1.132	(0.229-5.593)	0.879
M	2.520	(0.700-9.080)	0.158	0.365	(0.002-82.443)	0.716
N	2.738	(1.031-7.270)	0.043	0.861	(0.165-4.490)	0.859
Riskscore	1.038	(1.019-1.058)	<0.001	1.040	(1.019-1.062)	<0.001