Table 2a.
Diagnostic values of abdominal CT, PET–CT, CA19-9 and their combinations overall
| CT | PET | CA19-9 | CT + PET–CT | CT + CA19-9 | PET–CT + CA19-9 | P-Value |
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| CT vs. PET–CT | CT vs. CA19-9 | PET–CT vs. CA19-9 | CT vs. CT + PET–CT | PET vs. CT + PET–CT | |||||||
| Sensitivity | 75.0% (63/84) | 84.5% (71/84) | 67.9% (57/84) | 97.6% (82/84) | 97.6% (82/84) | 92.9% (78/84) | 0.180 | 0.397 | 0.019 | <0.001 | 0.007 |
| Specificity | 73.1% (19/26) | 84.6% (22/26) | 88.5% (23/26) | 65.4% (17/26) | 65.4% (17/26) | 76.9% (20/26) | 0.499 | 0.290 | 0.995 | 0.763 | 0.201 |
| PPV | 90.0% (63/70) | 94.7% (71/75) | 95.0% (57/60) | 90.1% (82/91) | 90.1% (82/91) | 92.9% (78/84) | 0.450 | 0.462 | 0.754 | 0.807 | 0.419 |
| NPV | 47.5% (19/40) | 62.8% (22/35) | 46.0% (23/50) | 89.5% (17/19) | 89.5% (17/19) | 76.9% (20/26) | 0.273 | 0.944 | 0.191 | 0.005 | 0.076 |
| Accuracy | 74.5% (82/110) | 84.5% (93/110) | 72.7% (80/110) | 90.0% (99/110) | 90.0% (99/110) | 89.1% (98/110) | 0.095 | 0.881 | 0.049 | 0.005 | 0.307 |