Radiation Therapy Improves Survival Outcome in Pancreatic Adenocarcinoma: Comparison of a 15-Year Institutional Experience at the University of Nebraska Medical Center with SEER Data

Table 3

Cox multivariate analysis of overall survival.

	UNMC hazard ratio (95% CI)	𝑃 (𝜒^2)	SEER hazard ratio (95% CI)	𝑃 (𝜒^2)
Radiation therapy (yes versus no)	0.772 (0.623–0.957)	0.018	0.645 (0.631–0.660)	<0.0001
Chemotherapy (yes versus no)	0.424 (0.343–0.523)	<0.0001
Surgery (yes versus no)	0.353 (0.268–0.466)	<0.0001	0.460 (0.448–0.473)	<0.0001
Stage (advanced versus early)	1.236 (1.113–1.372)	<0.0001	1.425 (1.403–1.447)	<0.0001
Age (>68 versus ≤68)	1.371 (1.142–1.645)	0.001	1.007 (1.006–1.007)	<0.0001
Race (nonwhite versus white)	0.723 (0.514–1.016)	0.062	1.040 (1.018–1.063)	0.0003
Gender (male versus female)	1.066 (0.892–1.274)	0.481	1.042 (1.025–1.060)	<0.0001
Year (earlier versus current)	1.014 (0.996–1.033)	0.128	1.067 (1.059–1.076)	<0.0001