Table 3. Closed pleural biopsy results, diagnosed as tuberculosis.
| Indicators | Gold standard | ||
|---|---|---|---|
| Positive | Negative | Total | |
| CPB | |||
| Positive | 149 | 0 | 149 |
| Negative | 68 | 262 | 330 |
| Total | 217 | 262 | 479 |
| Test performance indicator | |||
| Sensitivity (%) | |||
| a/(a+c) =149/217 | – | 68.7% | – |
| Specificity (%) | |||
| d/(b+d) =262/262 | – | 100% | – |
| Positive predictive value (%) | |||
| a/(a+b) =149/149 | – | 100% | – |
| Negative likelihood ratio (%) | |||
| d/(c+d) =262/330 | – | 79.4% | – |
a: true-positive results; b: false-positive results; c: false-negative results; d: true-negative results.