Table 2b.
Diagnostic values of abdominal CT, PET–CT, CA19-9 and their combinations according to the recurrence site
| CT | PET–CT | CT + PET–CT | P-Value |
||||
|---|---|---|---|---|---|---|---|
| CT vs. PET–CT | CT vs. CT + PET–CT | PET–CT vs. CT + PET–CT | |||||
| Local recurrence | Sensitivity | 82.5% (33/40) | 80.0% (32/40) | 97.5% (39/40) | 1.000 | 0.062 | 0.033 |
| Specificity | 95.7% (67/70) | 92.9% (65/70) | 88.6% (62/70) | 0.726 | 0.212 | 0.558 | |
| PPV | 91.7% (33/36) | 86.5% (32/37) | 83.0% (39/47) | 0.736 | 0.405 | 0.891 | |
| NPV | 90.5% (67/74) | 89.0% (65/73) | 98.4% (62/63) | 0.978 | 0.110 | 0.064 | |
| Accuracy | 90.9% (100/110) | 88.2% (97/110) | 91.8% (101/110) | 0.664 | 0.998 | 0.506 | |
| Distant recurrence | Sensitivity | 67.7% (44/65) | 83.1% (54/65) | 95.4% (62/65) | 0.067 | <0.001 | 0.048 |
| Specificity | 88.9% (40/45) | 86.7% (39/45) | 80.0% (36/45) | 1.000 | 0.382 | 0.569 | |
| PPV | 89.8% (44/49) | 90.0% (54/60) | 87.3% (62/71) | 0.776 | 0.897 | 0.835 | |
| NPV | 65.6% (40/61) | 78.0% (39/50) | 92.3% (36/39) | 0.221 | 0.005 | 0.122 | |
| Accuracy | 76.4% (84/110) | 84.5% (93/11) | 89.1% (98/110) | 0.179 | 0.021 | 0.419 | |