Table 2.

Multivariate analysis for OS of R/M HNSCC patients.

Factors	Sig.	Exp(B)	95.0%Cl for Exp(B)
			Lower	Upper
Sex (Male vs Female)	.977	.989	.466	2.102
Age (≥60vs<60)	.796	1.097	.543	2.215
Primary tumor site (Oral vs Oropharyngeal)	.766	.816	.215	3.101
Recurrence pattern	.673	1.161	.581	2.319
HPV infection (Positive vs Negative)	.694	1.593	.157	16.160
ECOG PS(1 vs 2)	.307	1.596	.650	3.919
First-line therapy vs ≥2nd line therapy	.018	.380	.171	.845
irAEs vs No irAEs	.018	.297	.108	.813