Table 2.
Discrimination performance of individual discriminative LMIs (PC/BTC vs. control/CRC/OVC groups)
| Mass ion | Separating threshold | Fisher’s discriminant ratio | |||
|---|---|---|---|---|---|
| Mass value (m/z) | Retention time (min) | Maximum | Minimum | Difference | |
| 283.2018 | 10.17 | 4.27 | 3.62 | 0.65 | 53.50 |
| 305.1860 | 10.17 | 4.03 | 3.92 | 0.11 | 16.95 |
| 394.2633 | 10.80 | 4.95 | 4.14 | 0.81 | 39.89 |
| 505.3401 | 11.03 | 4.82 | 4.20 | 0.62 | 18.78 |
| 505.3405 | 10.93 | 4.28 | 4.25 | 0.03 | 8.40 |
| 527.3245 | 11.39 | 4.46 | 3.64 | 0.82 | 48.98 |
| 527.3246 | 11.03 | 4.66 | 4.56 | 0.10 | 10.38 |
| 550.3229 | 11.56 | 4.57 | 4.33 | 0.24 | 26.70 |
| 555.2872 | 11.56 | 3.99 | 3.85 | 0.14 | 26.65 |
| 594.3589 | 11.74 | 4.46 | 3.54 | 0.92 | 41.05 |
| 599.3159 | 11.76 | 4.15 | 4.07 | 0.08 | 17.40 |
| 616.3988 | 11.18 | 4.50 | 3.84 | 0.66 | 31.55 |
| 638.3749 | 11.89 | 4.54 | 3.59 | 0.95 | 56.24 |
| 643.3331 | 11.89 | 4.17 | 3.80 | 0.37 | 35.64 |
LMI low-mass ion, PC pancreatic cancer, BTC biliary tract cancer, CRC colorectal cancer, OVC ovarian cancer