TABLE 3.
Optimal cutoff values with associated sensitivities and specificities to discriminate between LTBI and active TB
| Analytical criteriona | Targetb | Cutoff | Sensitivity (%) | Specificity (%) |
|---|---|---|---|---|
| TB Ag | IL-13 | 0 | 100 | 60 |
| IFN-γ | 172.84 | 93.94 | 60 | |
| IP-10 | 23,780.88 | 69.7 | 100 | |
| TB Ag/mitogen ratio | IL-13 | 0.0363 | 78.79 | 85 |
| IFN-γ | 0.0454 | 87.88 | 75 | |
| IP-10 | 0.7906 | 93.94 | 90 |
a
TB, tuberculosis; Ag, antigen,
b
IL-13, interleukin-13; IFN-γ, interferon-gamma; IP-10, interferon gamma-induced protein 10/chemokine (C-X-C) motif ligand-10.