Diagnostic and prognostic values of pancreatic juice carbohydrate antigen 19-9 and carcinoembryonic antigen levels in patients with pancreatic cancer

Table 9 Differences in 2-year and 5-year survival by carbohydrate antigen 19-9 and carcinoembryonic antigen values, n (%)

	Died	Alive	Total	Arithmetic mean	95%CI for arithmetic mean	Median	95%CI median	Log-rank test
2-year
CA 19-9
< 25 U/mL	0	4 (100)	4	24 (0)	24-24	-	-	0.04
≥ 25 U/mL	9 (69)	4 (31)	13	30 (8.3)	13.2-45.9	16	6-17
CEA
< 2.5 ng/mL	3 (50)	3 (50)	6	18.2 (2.7)	12.7-23.5	17	4-17	0.70
≥ 2.5 ng/mL	6 (55)	5 (45)	11	15.5 (2.5)	10.7-20.4	16	6-16
5-year
CA 19-9
< 25 U/mL	1 (25)	3 (75)	4	53 (4.5)	44.1-61.9	-	-	0.04
≥ 25 U/mL	11 (85)	2 (15)	13	22 (5.2)	11.7-31.9	16	6-23
CEA
< 2.5 ng/mL	3 (50)	3 (50)	6	36.2 (8.5)	19.6-52.8	17	4-17	0.29
≥ 2.5 ng/mL	9 (82)	2 (18)	11	25.4 (5.9)	13.8-36.9	16	6-53

CA 19-9: Carbohydrate antigen 19-9; CEA: Carcinoembryonic antigen; CI: Confidence interval.