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Table 3 Multivariate Cox regression model of overall survival of patients with non-metastatic locally recurrent NPC

From: Long-term outcomes of a phase II randomized controlled trial comparing intensity-modulated radiotherapy with or without weekly cisplatin for the treatment of locally recurrent nasopharyngeal carcinoma

Variable β Relative risk P valuea Hazard ratio 95% confidence interval
rT1–2 category vs. rT3–4 categoryb 4.592 1.219 0.000 98.668 9.053–1075.343
Stages I–II versus Stages III–IVb –2.802 1.098 0.011 0.061 0.007–0.522
CCRT versus RT 0.942 0.313 0.003 2.566 1.389–4.740
≤46 years versus >46 years 0.990 0.309 0.001 2.692 1.470–4.931
  1. Abbreviations as in Tables 1 and 2
  2. aBy Cox proportional hazards model test
  3. bRestage according to the 2002 6th edition TNM staging system of AJCC