Table 2. Closed pleural biopsy results, diagnosed as malignancy*.
| Indicators | Gold standard | ||
|---|---|---|---|
| Positive | Negative | Total | |
| CPB | |||
| Positive | 135 | 0 | 135 |
| Negative | 127 | 217 | 344 |
| Total | 262 | 217 | 579 |
| Test performance indicator | |||
| Sensitivity (%) | |||
| a/(a+c) =135/262 | – | 51.5% | – |
| Specificity (%) | |||
| d/(b+d) =217/217 | – | 100% | – |
| Positive predictive value (%) | |||
| a/(a+b) =135/135 | – | 100% | – |
| Negative likelihood ratio (%) | |||
| d/(c+d) =217/344 | – | 63.1% | – |
*, malignancy included lung cancer, mesothelioma, hematological malignancy and metastatic carcinoma. a: true-positive results; b: false-positive results; c: false-negative results; d: true-negative results.