. Author manuscript; available in PMC: 2014 Jul 22.

Published in final edited form as: Radiother Oncol. 2012 Oct 17;105(1):9–13. doi: 10.1016/j.radonc.2012.09.011

Table 2. Multivariate analysis for overall survival: head of pancreas patients only (n = 359) (31).

Adjustment Variables	Comparison	Adjusted HR	p-value^‡
Treatment	Gemcitabine vs. 5-FU	0.79 (0.62-0.99)	0.043
Nodal Involvement	No vs. Yes	1.47 (1.13-1.91)	0.0036
Tumor Diameter	<3 vs. ≥ 3cm	1.25 (0.98-1.59)	0.070
Surgical Margin Status	Negative	Ref level	--
	Positive	1.07 (0.82-1.40)	0.64
	Unknown	0.94 (0.69-1.27)	0.68
RT QA Score	< PP vs. PP	0.75 (0.60-0.95)	0.016

Abbreviations: 5-FU = fluorouracil; HR = hazard ratio; CI = confidence interval.

^‡

p value from chi-square test using the Cox proportional hazards model.