Skip to main content
. 2015 Dec 16;15:977. doi: 10.1186/s12885-015-1964-8

Table 2.

Multivariate analysis of prognostic factors in 491 nasopharyngeal carcinoma patients receiving IMRT

Endpoint Variable HR HR (95 % CI) P value
OS N Stage(0) Ref Ref 0.001
N Stage(1) 1.172 0.252- 5.453 0.839
N Stage(2) 1.767 0.393- 7.950 0.458
N Stage(3) 7.404 1.494- 36.684 0.014
Low-dose group Ref Ref 0.001
Median-dose group 0.135 0.045-0.405 <0.001
High-dose group 0.225 0.069-0.734 0.013
EBV DNA 4.953 2.200-11.153 <0.001
DMFS EBV DNA 3.669 2.058-6.540 <0.001

HR hazard ratio, CI confidence interval, Ref reference, OS overall survival, DMFS distant metastasis free survival, EBV DNA Epstein–Barr virus deoxyribonucleic acid. P value < 0.05 is statistically significant