Fig. 1
Overall survival (OS) and cause-specific survival (CSS) between NRT and no NRT patients, stratified by T and N stages. A-D Kaplan-Meier curves for OS in T1–2N− (A), T1–2N+ (B), T3–4N− (C), and T3–4N+ (D) clinical subgroups; E-H Kaplan-Meier curves for CSS in T1–2N− (E), T1–2N+ (F), T3–4N− (G), and T3–4N+ (H) clinical subgroups. CSS information was missing in a few patients. NRT: neo-adjuvant radiotherapy