Table 3.
Diagnostic performance of positron emission tomography/CT parameters for detecting metastasis lymph nodes
| Parameters | Lesion-based results (n) |
Diagnostic performance (%) |
p-value | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| TP | TN | FP | FN | Total | SN | SP | Accuracy | PPV | NPV | ||
| SUVmax (≥4.6) | 21 | 42 | 3 | 8 | 74 | 72.4 | 93.3 | 85.1 | 87.5 | 84.0 | |
| Size (≥6.8 mm) | 23 | 28 | 17 | 6 | 74 | 79.3 | 62.2 | 68.9 | 57.5 | 82.4 | 0.003a |
| CV (≥0.194) | 22 | 40 | 5 | 7 | 74 | 75.9 | 88.9 | 83.8 | 81.5 | 85.1 | 0.508a, 0.004b |
CV, coefficient of variation; FN, false negative; FP, false positive; NPV, negative predictive value; PPV, positive predictive value; SN, sensitivity; SP, specificity; SUVmax, maximum standardized uptake value; TN, true negative; TP, true positive.
a
compared with SUVmax.
b
compared with size criteria.