The Utility of Preoperative Vascular Grading in Patients Undergoing Surgery First for Pancreatic Cancer: Does Radiologic Arterial or Venous Involvement Predict Pathologic Margin Status?

Table 5

Overall survival estimates at 12, 24, and 36 months by Ishikawa and arterial staging groups.

		-value	12 mos	LCL	UCL	24 mos	LCL	UCL	36 mos	LCL	UCL
Ishikawa
I	84	0.0056	82.9%	72.8%	89.5%	50.8%	39.3%	61.3%	29.8%	19.9%	40.4%
II-IV	50		62.0%	47.1%	73.8%	32.0%	19.7%	45.0%	14.0%	6.2%	25.0%
Arterial classification
i	71	0.0422	82.6%	71.5%	89.7%	49.5%	37.0%	60.8%	28.7%	18.3%	40.0%
ii-iii	25		64.0%	42.2%	79.4%	36.0%	18.2%	54.2%	8.0%	1.4%	22.5%
Combined
Both clean	57	0.2981	83.7%	71.0%	91.2%	49.2%	35.0%	61.8%	28.7%	17.0%	41.5%
One involved	20		85.0%	60.4%	94.9%	50.0%	27.1%	69.2%	20.0%	6.2%	39.3%
Both involved	16		50.0%	24.5%	71.0%	37.5%	15.4%	59.8%	12.5%	2.1%	32.8%

LCL: lower confidence level; UCL: upper confidence level.