Table 2.

Multivariable Cox Proportional Hazards Regression Model of Progression-Free and Overall Survival

Variable	Hazard Ratio	95% CI	P
Progression-free survival (n = 777)
Age	0.99	0.98 to 1.00	.13
Male	1.25	1.02 to 1.54	.03
Incomplete resection	1.84	1.49 to 2.28	< .001
Adjuvant first-line radiation	0.63	0.49 to 0.79	< .001
Chemotherapy	1.04	0.81 to 1.34	.76
EPN_PFA subgroup	2.14	1.31 to 3.49	.002
Overall survival (n = 778)
Age	0.98	0.96 to 1.00	.12
Male	1.41	1.97 to 1.85	.01
Incomplete resection	2.13	1.60 to 2.82	< .001
Adjuvant first-line radiation	0.52	0.38 to 0.72	< .001
Chemotherapy	0.90	0.65 to 1.26	.54
EPN_PFA subgroup	4.30	1.88 to 9.87	< .001