Table 5.
The diagnostic performances of the cutoff values for the different variables in distinguishing pre-invasive/minimally invasive lesions and IPA lesions in 79 pure or heterogeneous GGNs.
| Characteristics | Cutoff value | AUC | Sensitivity | Specificity | PPV | NPV | Positive LR | Negative LR |
|---|---|---|---|---|---|---|---|---|
| Lesion size (mm) | ≧10 mm | 0.810 | 83.30% | 70.10% | 33.30% | 95.90% | 2.79 | 0.24 |
| SSN subclassfication | Heterogeneous GGN | 0.729 | 66.70% | 79.10% | 36.40% | 93.00% | 3.19 | 0.42 |
| HU (mean) | ≧−493 | 0.693 | 75.00% | 74.60% | 34.60% | 94.30% | 2.96 | 0.33 |
Abbreviations: AUC: the area under the curve; GGN: groundglass nodule; HU: Hounsfield unit; IPA: invasive pulmonary adenocarcinoma; SSN: subsolid nodule.