Identification of a Novel Biomarker for Biliary Tract Cancer Using Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry

Table 1

Clinical characteristics of patients with biliary tract cancer or benign biliary disease and healthy volunteers.

Healthy volunteers	Benign biliary disease	Biliary tract cancer
No. of patients	30	30	62
Male/female	18/12	18/12	36/26
Mean age	65.5 ± 4.5	64.4 ± 39.0	64.7 ± 37.4
CEA (ng/mL)	3.1 ± 3.5	2.5 ± 3.6	37.6 ± 1577.3
CA19-9 (U/mL)	15.3 ± 18.6	70.4 ± 603.9	5033.6 ± 190367.2