Table 3. Multivariate analyses for overall survival by Cox regression model.

	P value	Exp(B)	RR 95% CI
			Lower	Upper
Age	0.102	2.192	0.856	5.615
Gender	0.55	0.763	0.315	1.851
Ulcer history	0.368	0.643	0.247	1.68
Position	0.908	0.946	0.368	2.429
Clinical stage	0.001*	5.484	2.033	14.792
Clark level	0.011*	3.001	1.285	7.012
Breslow thickness	0.222	0.576	0.237	1.398
p-NF-κB	0.037*	2.887	1.066	7.82

^*P<0.05