TABLE 1.

Demographic and clinical characteristics.

	Cohort 1			Cohort 2
	Ileus	No ileus	p	Ileus	No ileus	p
N	34	51		15	23
Male/Female	17/17	33/18	0.18	7/8	11/12	0.94
Age, years	65.2 ± 10.4	65.1 ± 8.6	0.79	66.0 ± 9.1	62.9 ± 9.1	0.36
Tumor location
Proximal	8	13	0.84	5	6	0.63
Distal	26	38		10	17
CEA, ng/ml	20.3 ± 36.2	60.1 ± 201.9	0.85	44.9 ± 72.9	89.6 ± 384.2	0.64
CA199, U/ml	40.3 ± 66.0	78.4 ± 204.6	0.81	111.1 ± 251.1	24.2 ± 46.8	0.14
AFP, ng/ml	2.7 ± 3.1	2.1 ± 1.2	0.80	1.5 ± 0.6	2.5 ± 1.8	0.06
Ferroprotein, μg/L	158.1 ± 166.6	173.8 ± 182.0	0.69	61.6 ± 81.4	207.4 ± 406.4	0.19
Diameter, cm	3.0 ± 1.7	3.3 ± 2.0	0.79	1.5 ± 0.8	1.3 ± 0.7	0.53

The Wilcoxon rank-sum test was used to compare age, CEA, CA199, AFP, ferroprotein, and tumor diameter between the ileus and no-ileus groups. Fisher’s exact test was used to compare sex and tumor location distribution between the ileus and no-ileus groups. Values are expressed as the mean ± SD. AFP, α-fetoprotein; CA199, carbohydrate antigen 199; CEA, carcinoembryonic antigen.