borderline significancep=0.055
IMRT has been the most commonly employed RT technique in the treatment of NPC patients in Korea since 2010, and 48.3% of the patients in the current study underwent IMRT as iRT, who achieved better OS with borderline significance in multivariate analyses (hazard ratio [HR], 0.45; 95% confidence interval [CI], 0.20 to 1.02; p=0.055).