Clinical characteristics and outcomes in carbohydrate antigen 19-9 negative pancreatic cancer

Table 1 Characteristics of study patients according to carbohydrate antigen 19-9 value

	Group A (n = 29)	Group B (n = 82)	P value
Patient demographics
Age in yr, median	64	67	0.241
Male sex	58.62	70.73	0.333
At risk behaviors
Smoking	31.03	28.04	0.946
Drinker	20.68	23.17	0.987
Clinical findings
Abdominal pain	55.17	76.83	0.048
Jaundice	27.58	29.26	0.946
Weight loss	62.06	63.41	0.924
Diabetes mellitus	34.48	34.14	0.845
Tumor localization
Head, neck and uncinate	62.06	57.31	0.820
Body and tail	37.93	42.68
Tumor size in cm
< 2	10.34	2.43	0.447
2-4	58.62	64.63
> 4	31.03	32.92
Staging
Resectable	13.79	7.31	0.714
Borderline resectable	6.89	4.87
Locally advanced	20.68	24.39
Metastatic	58.62	63.31
Outcome
6-mo survival	58.62	47.56	0.308

Data are %, unless otherwise indicated. Group A: Patients classified as CA 19-9 negative or normal (< 37 U/mL); Group B: Patients classified as CA 19-9 positive (≥ 37 U/mL).