Table 2.

Relative risk (RR) of dying from vulvar cancer

Variables	Univariate analysis			Multivariate analysis
	RR	95% CI a	p	RR	95% CI a	p
Lymph node metastasis	1.99	1.49–2.65	<0.001	2.28	1.69–3.07	<0.001
Infiltration of vessel	2.20	1.36–3.58	0.001	-	-	-
Age	1.70	1.20–2.41	0.003	1.92	1.31–2.81	0.001
Tumor diameter	1.40	1.03–1.91	0.03	-	-	-
HIF-1αb	2.49	1.45–4.28	0.001	2.53	1.46–4.37	0.001

^a95% confidence interval.

^bLow: ≤ 50% tumor cells and high: > 50% tumor cells.