Fig. 1

Kaplan–Meier estimates of the OS (A), LRFS (B), DMFS (C), and PFS (D) for esophageal squamous cell carcinoma patients treated with definitive chemoradiotherapy in different radiotherapy time. OS, overall survival; LRFS, locoregional relapse-free survival; DMFS, distant metastasis-free survival; PFS, progression-free survival