Table 4. Multivariate analyses of survival in vulvar cancer patients.

Variables	Categories	Overall survival		p
		HR	95% CI
Nodal status	Negative for metastases	1	1.50-5.02	0.019
	Positive for metastases	2.74
Histologic Grade	Low (G1)	1	1.33-5.90	0.007
	High (G2+G3)	2.80
p16 status	Positive	1	1.13-3.95	0.001
	Negative	2.11
IC-PD-L1	negative	1	0.25-0.83	0.010
	positive	0.45