Diagnostic performance of mycobacterial culture and the Xpert assay on pleural tissue specimens
| Diagnostic test | Result | Tuberculosis | Nontuberculous | Sensitivity | Specificity | PPV | NPV | p-value |
| Xpert assay | Positive | 70 | 0 | 52.2% | 100% | 100% | 50% | <0.001 |
| Negative | 64 | 64 | ||||||
| Mycobacterial culture | Positive | 55 | 0 | 41% | 100% | 100% | 44.8% | <0.001 |
| Negative | 79 | 64 |
PPV: positive predictive value; NPV: negative predictive value.