Fig. 2

Kaplan–Meier analysis of survival outcomes. (A) Disease-free survival of all patients. (B) Locoregional recurrence-free survival of all patients. (C) Distant metastasis-free survival of all patients. (D) Overall survival of all patients. (E) Disease-free survival in camrelizumab maintenance subgroup vs. observation subgroup. (F) Locoregional recurrence-free survival in camrelizumab maintenance subgroup vs. observation subgroup. (G) Distant metastasis-free survival in camrelizumab maintenance subgroup vs. observation subgroup. (H) Overall survival in camrelizumab maintenance subgroup vs. observation subgroup