Fig. 3. (A, B) Both overall and CSS analysis showed that stage II patients that underwent postoperative RT had better prognosis than those receiving surgery alone after PSM (OS, P=0.037; CSS, P=0.036); (C, D) Both overall and CSS analysis showed that stage III patients that underwent postoperative RT had better prognosis than those receiving surgery alone after PSM (OS, P=0.0039; CSS, P=0.022).

OS = overall survival; CSS = cancer-specific survival; RT = radiotherapy; PSM = propensity score matching.