Figure 1. Time to recurrence.
(A) by survival group (surviving <24 months vs. >=24 months); (B) by HPV tumor status; (C) in patients surviving less than 24 months by HPV tumor status; (D) in patients surviving longer than 24 months by HPV tumor status; (E) HPV-positive patients by survival group; (F) HPV-negative patients by survival group.