Fig. 4

Kaplan-meier curves for univariate analysis of clinical characteristics in patients with recurrent/metastatic head and neck squamous cell carcinoma treated with pd-1 inhibitors in combination with a taxane-based chemotherapy. Note (A): Comparison of PFS survival curves based on the presence or absence of distant metastasis; (B): Comparison of OS survival curves based on the presence or absence of distant metastasis; (C): Comparison of PFS survival curves based on whether subsequent radiotherapy was administered; (D): Comparison of OS survival curves based on whether subsequent radiotherapy was administered; (E): Comparison of PFS survival curves based on whether radiotherapy was administered before recurrence/metastasis; (F): Comparison of OS survival curves based on whether radiotherapy was administered before recurrence/metastasis;