Table 2 Performances of SAT-TB and culture methods compared with clinical assessment of patients (n = 482)
| No. of cases with clinical diagnosis of TB | Mean % | ||||||
|---|---|---|---|---|---|---|---|
| Method | Result | Positive | Negative | Sensitivity | Specificity | PPV | NPV |
| SAT-TB assay | 41.6% | 100% | 100% | 16.2% | |||
| Positive | 180 | 0 | |||||
| Negative | 253 | 49 | |||||
| Culture methods | 29.3% | 98.0% | 99.2% | 13.6% | |||
| Positive | 127 | 1 | |||||
| Negative | 306 | 48 | |||||