Fig. 3

Kaplan Meier curves among patients stratified by surgery for nasopharyngeal carcinoma-specific death and all-cause death in patients with RT (a all-cause death, Log-rank test p = 0.0033; b cancer-specific death Log rank test p = 0.0038) and in patients without RT (c all-cause death, Log-rank test p < 0.0001; d cancer-specific death Log rank test p < 0.0001). Y-axis label “Survival probs” means survival probabilities