| No. of cases with clinical diagnosis of TB | Mean % | |||||
---|---|---|---|---|---|---|---|
Method | Result | Positive | Negative | Sensitivity | Specificity | PPV | NPV |
SAT-TB assay | Â | Â | Â | 41.6% | 100% | 100% | 16.2% |
 | Positive | 180 | 0 |  |  |  |  |
 | Negative | 253 | 49 |  |  |  |  |
Culture methods | Â | Â | Â | 29.3% | 98.0% | 99.2% | 13.6% |
 | Positive | 127 | 1 |  |  |  |  |
 | Negative | 306 | 48 |  |  |  |  |