Conclusions
PD-1/PD-L1 immune antibodies alone or with conventional treatments may
prolong the OS of participants with HNC and caused fewer AEs except for
hypothyroidism. Besides, patients with HPV positive and or PD-L1 CPS≥1
had a lower risk of death, while no statistical differences in ORR and
DCR were observed between different HPV status and experimental groups
and control groups.