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Diagnostic accuracy of Xpert MTB/RIF assay and AFB smear using BALF with AFB culture as gold standard.
| Variables | Sensitivity* % (95 CI) | Specificity % (95 CI) | Positive Predictive Value % (95 CI) | Negative Predictive Value % (95 CI) |
|---|---|---|---|---|
| Xpert MTB/RIF assay | 90.0 (59.6–98.2) | 52.2 (38.1–65.9) | 29.03 (16.1–46.6) | 96.0 (80.5–99.3) |
| AFB smear | 60.0 (31.2–83.1) | 67.4 (53.0–79.1) | 28.6 (13.8–50.0) | 88.6 (74.1–95.5) |
(McNemar's Test: *p = 0.25). BALF: Bronchoalveolar lavage fluid.
