Table 13. Comparison of the performance of different TB diagnostic methods.
| Diagnostic Method | Active TB patients | Health controls | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) | |
|---|---|---|---|---|---|---|---|---|
| Cytokine / Antigen array | Positive | 71 | 6 | 91.03 | 92.59 | 92.21 | 91.46 | 91.82 |
| Negative | 7 | 75 | ||||||
| IGR assay | Positive | 73 | 8 | 84.88 | 76.47 | 90.12 | 66.67 | 82.5 |
| Negative | 13 | 26 | ||||||
| TB-specific antibody test (Colloidal Gold) | Positive | 140 | 80 | 69.65 | 60.78 | 63.63 | 67.03 | 65.19 |
| Negative | 61 | 124 | ||||||
| LJ culture | Positive | 71 | 0 | 35.32 | 100 | 100 | 61.08 | 67.9 |
| Negative | 130 | 204 |