MOESM8 of Development and validation of a novel MR imaging predictor of response to induction chemotherapy in locoregionally advanced nasopharyngeal cancer: a randomized controlled trial substudy (NCT01245959)

Additional file 8: Figure S4. Failure-free survival in the validation cohort stratified by the usual clinical risk factors. Abbreviations: ICT, induction chemotherapy; CCRT, concurrent chemoradiotherapy; pEBV DNA, plasma Epstein–Barr Virus DNA. Note: Pinteraction = 0.74 for pEBV DNA, Pinteraction = 0.47 for N stage, Pinteraction = 0.77 for T stage. aStaging, T classification, N classification were determined based on the 7th edition of the American Joint Commission on Cancer staging system.