# Protein Calculated monoisotopic mass [M+H]+ AUC Sensitivity (%) Specificity (%) Cutoff Fold change (CRC/Control) ClinProTools p-value*1
1 Alpha-1-antichymotrypsin 4352.34 0.690 60 71 10,723 0.67 < 0.000001
2 Alpha-1-antitrypsin 2390.26 0.685 74 56 4,532 0.83 0.000030
3 Alpha-2-HS-glycoprotein 2739.53 0.742 43 94 54,162 0.75 < 0.000001
4 Alpha-2-HS-glycoprotein 2858.42 0.754 75 70 58,384 0.69 < 0.000001
5 Coagulation factor XIII subunit A 3949.98 0.803 76 73 66,666 0.62 < 0.000001
6 Fibrinogen alpha chain 1465.66 0.583 35 83 182,168 1.08 0.000517
7 Fibrinogen alpha chain 1616.66 0.571 51 67 52,321 1.22 0.006910
8 Fibrinogen alpha chain 2768.23 0.589 57 62 28,522 0.81 0.004350
9 Fibrinogen alpha chain 5078.35 0.647 71 54 20,407 0.84 0.000004
10 Platelet factor 4 7759.18 0.567 81 37 24,139 0.97 0.005640
11 Prothrombin 4089.02 0.549 43 75 7,796 0.98 0.012600
12 Vasodilator-stimulated phosphoprotein 3622.78 0.712 56 81 3,460 1.68 < 0.000001
13 Vinculin 4038.05 0.662 50 78 2,112 2.97 0.024400
14 Vinculin 4152.99 0.636 67 57 9,657 1.80 0.000001
*1 Wilcoxon rank-sum test. p-value< 0.05 was considered statistically significant.      
BLOTCHIP®-MS analysis of subject serum detected 159 statistically significant peaks, which were differentially expressed in CRC patients and controls. Shapes of all the peaks obtained by the statistical analyses were examined by manual inspection to obtain 31 peaks that were sharp and strong. From these, 14 peptides were finally selected as biomarker candidate peptides for CRC diagnosis. Fold changes indicate the ratio of median values (CRC patients/controls). P-values of the Wilcoxon rank-sum tests were calculated using ClinProTools 2.2.
Table 3: Diagnostic performance of the peptides.