Fig. 1From: Consolidative chemotherapy after definitive concurrent chemoradiotherapy for esophageal squamous cell carcinoma patients: a population based cohort studySTROBE study flowchart and the number of individuals at each stage of the study. 1We only included those treated (class 1–2) to ensure data consistency. 2Clinical stage cT2-4N0M0 or cT1-4N+M0 for the 7th American Joint Committee on Cancer staging. 350–70 Gy in 1.8–2 Gy/fraction. 4Without missing information in the TCR and death registry regarding survival status, and cause of deathBack to article page