Diagnostic accuracy of pleural fluid analysis
| Parameter | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
| ADA (IU/l) | 89.4 | 73.9 | 90.8 | 70.8 |
| Lymphocyte predominance* | 90.9 | 60.9 | 87.0 | 70.0 |
| ADA >50 IU/l and lymphocyte predominant | 83.3 | 95.7 | 98.2 | 66.7 |
| Mycobacterium tuberculosis culture positive | 25.8 | 100 | 100 | 31.9 |
↵* Lymphocytic predominant effusion: >75% lymphocytes and/or lymphocyte to neutrophil ratio >0.75.
ADA, adenosine deaminase; NPV, negative predictive value; PPV, positive predictive value.