Table 3.

Multivariate analyses of pathologic variables and association with survival

Variable		Hazard ratio	95% CI	p-Value
Retroperitoneal margin	R0	Referent
	R1	1.37	1.13–1.64	<0.01
	R2	1.55	0.79–2.70	0.16
Pancreatic neck margin	R0	Referent
	R1	1.26	0.97–1.62	0.07
Adjuvant Therapy	Yes vs. No at 25th percentile of OS	1.78	1.38–2.31	<0.01
	Yes vs. No at 50th percentile of OS	1.28	1.03–1.58	0.03
	Yes vs. No at 75th percentile of OS	0.70	0.58–0.85	<0.01
Lymph node harvest	>10 vs. <= 10 at 25th percentile of OS	2.99	2.25–3.98	<0.01
	>10 vs. <= 10 at 50th percentile of OS	1.89	1.50–2.38	<0.01
	>10 vs. <= 10 at 75th percentile of OS	0.83	0.67–1.01	0.07
Lymph node status	Negative	Referent
	Positive	1.59	1.32–1.93	<0.01
Grade	Well differentiated	Referent
	Moderately differentiated	1.48	1.09–2.05	0.01
	Poorly differentiated	2.02	1.47–2.83	<0.01

OS--Overall survival.