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Accuracy values of PET/CT and nomogram in LN metastasis.
| Variable | PET/CT | Nomogram |
|
| Training cohort | Validation cohort | ||
| Sensitivity | 75.2% | 82.0% | 78.3% |
| Specificity | 78.0% | 89.0% | 90.8% |
| Positive predictive value (PPV) | 57.6% | 72.5% | 79.7% |
| Negative predictive value (NPV) | 88.8% | 93.3% | 90.2% |
| Accuracy | 77.2% | 87.2% | 86.9% |
PET/CT, positron emission tomography/computed tomography; LN, lymph node.
