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Table 4 Estimation of hazard ratio, β coefficient, and risk score based on a multivariate Cox proportional risk model

From: Survival benefit of induction chemotherapy for locally advanced nasopharyngeal carcinoma: prognosis based on a new risk estimation model

  HR β coefficient P value Risk score
Sex
Female 1 1   0
Male 1.406 (0.85–2.324) 0.34 0.185 12
Age group, years
  ≤ 55 1 1   0
  > 55 1.414 (0.973–2.055) 0.346 0.069 12
Staging
III 1 1 .. 0
IVA 1.396 (0.958–2.036) 0.334 0.083 12
IVB 1.793 (1.087–2.958) 0.584 0.022 21
Smoking
No 1 1   0
Yes 1.150 (0.792–1.670) 0.14 0.463 5
EBV-DNA levels
  ≤ 1500 1 1   0
  > 1500 1.848 (1.297–2.633) 0.614 0.001 22