Table 1 Sensitivity, specificity, positive predictive value and negative predictive value of culture, microscopy and Xpert MTB/RIF performed on lavage specimens
Smear Microscopy | Xpert MTB/RIF | Adjusted Xpert MTB/RIFa | ||||
|---|---|---|---|---|---|---|
% | 95 % CI | % | 95 % CI | % | 95 % CI | |
Sensitivity | 41.0 | 26 – 57.8 | 92.3 | 78 – 98 | 88.6 | 74.6 – 95.7 |
Specificity | 98.6 | 91.6 – 99.9 | 87.7 | 77.4 – 93.9 | 91.2 | 81.1 – 96.4 |
PPV | 94.1 | 69.2 – 99.7 | 80.0 | 64.9 – 89.9 | 86.7 | 72.5 – 94.4 |
NPV | 75.8 | 65.7 – 83.7 | 95.5 | 86.6 – 98.8 | 92.5 | 82.7 – 97.2 |