. Author manuscript; available in PMC: 2012 Jul 24.

Published in final edited form as: Surgery. 2009 Aug;146(2):250–257. doi: 10.1016/j.surg.2009.02.023

Table IV.

Multivariate analysis for distal neoplasms

Variable	Relative risk	95% confidence interval		P value
Variable	Relative risk	Lower	Upper	P value
Nodal metastasis	1.15	0.73	1.80	.55
Perineural invasion	1.70	1.11	2.61	.015
Vascular invasion	1.73	1.12	2.65	.013
Pancreas invasion	0.98	0.46	2.08	.95
Depth of invasion				.001
<5 mm	1			—
5–12 mm	3.81	1.13	12.85	.031
>12 mm	6.69	1.94	23.08	.003