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Table 3 Multivariate analyses of prognostic factors in 316 patients with stage III-IVb

From: Prognostic value of total tumor volume in patients with nasopharyngeal carcinoma treated with intensity-modulated radiotherapy

Endpoint Variable HR 95% CI P-value
FFS TTV 3.362 1.677–6.738 0.001
OS Sex 1.735 0.906–3.321 0.096
  Additional boost 1.860 0.947–3.654 0.072
  Chemotherapy 2.384 1.109–5.126 0.026
  N stagea 1.551 0.994–2.421 0.053
  TTV 4.364 2.125–8.964 <0.001
DMFS TTV 2.923 1.323–6.459 0.008
LRRFS TTV 2.464 0.951–6.383 0.063
  1. aAccording to the 7th edition of the American Joint Commission on Cancer staging system; HR hazard ratio, CI confidence interval, FFS failure free survival, OS overall survival, DMFS distant metastasis-free survival, LRRFS loco-regional relapse free survival, TTV total tumor volume, RT radiotherapy