From: Pretreatment prognostic factors of survival and late toxicities for patients with nasopharyngeal carcinoma treated by simultaneous integrated boost intensity-modulated radiotherapy
Variables
Univariate
Multivariate
HR
95% CI
p
Radiation neuropathy
 T classificationa (T1–2 vs T3–4)
4.7
1.4–15.3
0.010
3.5
1.0–12.1
0.048
 Gross tumor volume (continuous)
1.007
1.002–1.013
0.004
1.006
1.001–1.011
0.027