Table 3. Multivariable analysis of potential predictors of survival outcomes.

Factor	Overall survival			Locoregional failure-free survival			Distant metastasis-free survival
	OR	P value		OR	P value		OR	P value
Nomogram score: >125 vs. ≤125	0.57	<0.001		0.48	<0.001		0.57	<0.001
Age at diagnosis	NS	NS		0.98	0.025		0.96	<0.001
Tumor histology: squamous vs. adeno	NS	NS		1.59	0.025		0.51	0.005
Disease stage: III/IV vs. I/II	2.28	<0.001		NS	NS		NS	NS
Tumor length	NS	NS		1.05	0.015		NS	NS
Nodal status: node+ vs. node-	NS	NS		NS	NS		2.63	<0.000
Total radiation dose, Gy	NS	NS		NS	NS		0.95	0.048
Baseline PET scan: yes vs. no	0.4	0.02		NS	NS		NS	NS
Baseline PET SUV (continuous)	NS	NS		NS	NS		1.03	0.001
Primary tumor response on PET at 3 mo: < PR vs. CR	NS	NS		1.63	0.029		1.98	0.011

OR, odds ratio; NS, not significant; PET, positron emission tomography; SUV, standardized uptake value; PR, partial response; CR, complete response.