Table 4.

Univariate Cox Regression analysis of overall survival for patients stratified by mean HID proximity frequencies

	HPV positive		HPV negative		All
Cell interactions	HR (95% CI)	P value	HR (95% CI)	P value	HR (95% CI)	P value
CD8+ within 30 μm of PD-L1+	0.82 (0.26, 2.50)	0.73	2.95 (1.15, 7.56)	0.02	1.15 (0.58, 2.30)	0.68
PD-1+ within 30 μm of PD-L1+	0.59 (0.17, 2.06)	0.41	2.64 (1.04, 6.71)	0.04	1.15 (0.58, 2.29)	0.69