Table 4.

Percent Change in Pre- to Postoperative CA19-9 Level

CA19-9 Percent Decrease (%)	Median Survival Time (years)	No. of Patients	Univariate P (log-rank test)
< 0, increased	0.5	21
≥ 0, decreased	1.9	90	.0006
< 10	0.5	22
≥ 10	1.9	89	.002
< 20	0.6	24
≥ 20	1.8	87	.04
< 30	0.9	29
≥ 30	1.8	82	.16
< 40	1.0	35
≥ 40	1.8	76	.17
< 50	1.0	37
≥ 50	1.8	74	.10
< 60	1.2	46
≥ 60	2.0	65	.04
< 70	1.3	55
≥ 70	2.0	56	.12
< 80	1.3	68
≥ 80	2.3	43	.25
< 90	1.3	84
≥ 90	2.9	27	.08