Table 1. Univariate and multivariate Cox regression analyses.

Parameters variable	Univariate analysis			Multivariate analysis
	HR	95%CI	P	HR	95%CI	P
Age (continued)	1.046	1.008-1.085	0.019a	1.035	0.993-1.078	0.101
Sex (M/F)	1.542	0.651-3.652	0.325
Basal diameter (high/low)	2.484	0.999-6.179	0.050a	1.609	0.528-4.908	0.403
Tumor thickness (high/low)	1.643	0.703-3.838	0.251
T stage (T4/T2+T3)	2.252	0.945-5.365	0.067a	1.347	0.436-4.163	0.604
Pathologic stage (III+IV/II)	1.172	0.513-2.677	0.706
Risk score (high/low)	33.437	4.480-249.54	0.001a	5.430	1.820-16.199	0.002a

^aStatistical significance.