Assay (N139) | TB culture | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) | |
positive | negative | ||||||
LFD-LAMP TB positive | 35 | 12 | 85.4 (70.8 - 94.4) | 87.8 (79.6 - 93.5) | 74.5 (59.7 - 86.1) | 93.5 (86.3 - 97.6) | 87.1 |
LFD-LAMP TB negative | 6 | 86 | |||||
Xpert MTB/RIF ultrat positive | 39 | 25 | 95.1 (83.5 - 99.4) | 74.5 (64.7 - 82.8) | 60.9 (47.9 - 72.9) | 97.3 (90.7 - 99.7) | 80.6 |
Xpert MTB/RIF ultrat negative | 2 | 73 | |||||
AFB smaer positive | 29 | 11 | 70.7 (54.5 - 83.9) | 88.8 (80.8 - 94.3) | 72.5 (56.1 - 85.4) | 87.9 (79.8 - 93.6) | 83.4 |
AFB smaer negative | 12 | 87 |