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Comparison of progression‐free survival (PFS) in patients (a) with persistent N2 disease and in those with N2 clearance. N2 persistent, N2 clearing; (b) treated with surgery and definitive chemoradiation therapy (CRT). CRT+operation (CRT+op), definite CRT. Comparison of locoregional PFS in patients (c) with persistent N2 disease and in those with N2 clearance. N2 persistent, N2 clearing; and (d) treated with surgery and definitive CRT. CRT+op, definite CRT.
