Table 4.
Diagnostic efficiency of PET/CT compared with other tests.
| Sensitivity | Specificity | Accuracy | PPV | NPV | |
|---|---|---|---|---|---|
| PET/CT (n = 467) | 91.9% | 96.3% | 94.0% | 96.6% | 91.3% |
| PET/CTΔ with CA19-9 (n = 358) | |||||
| PET/CT | 90.5% | 95.2% | 92.7% | 95.6% | 89.9% |
| CA19-9 | 80.0%** | 69.0%*** | 74.9% | 74.5% | 75.3% |
| PET/CT//CA19-9 | 97.4%*** | 64.3%*** | 81.8% | 75.5% | 95.6% |
| PET/CT + CA19-9 | 73.2%*** | 100.0%** | 85.8% | 100.0% | 76.7% |
| CECTΔ with PET/CT (n = 191) | |||||
| CECT | 83.6% | 77.8% | 81.2% | 83.6% | 77.8% |
| PET/CT | 89.1%N.S. | 96.3%*** | 92.1% | 97.0% | 86.7% |
| PET/CT//CECT | 94.5%*** | 76.5%N.S. | 86.9% | 84.6% | 91.2% |
| PET/CT + CECT | 78.2%* | 97.5%*** | 86.4% | 97.7% | 76.7% |
| CEMRΔ with PET/CT (n = 82) | |||||
| CEMR | 91.2% | 75.0% | 81.7% | 72.1% | 92.3% |
| PET/CT | 88.2%N.S | 93.8%** | 91.5% | 90.9% | 91.8% |
| PET/CT // CEMR | 94.1%N.S. | 75.0% | 82.9% | 72.7% | 94.7% |
| PET/CT + CEMR | 85.3%N.S. | 93.8%** | 90.2% | 90.6% | 86.5% |
Statistical significance compared with testΔ:
***
P <0.001;
**
P <0.01;
*
P <0.05; N.S. = not significant.
When equal, McNemar test is inapplicable.