Table 6.
Agreement in rates of PTB detection between IFN-γ ELISPOT and T-SPOT.TB assaysa
| IFN-γ ELISPOT (E6+E7 and E6+E7+C14) assay result | No. of samples with T-SPOT.TB assay (panel A and panel B) result |
P value | ||
|---|---|---|---|---|
| Positive | Negative | Total | ||
| Positive | 82 | 1 | 83 | 0.63 |
| Negative | 3 | 0 | 3 | |
| Total | 85 | 1 | 86 | |
a
Eighty-six PBL samples from patients with PTB were assayed at the same time by IFN-γ ELISPOT assay and T-SPOT.TB assay. The results were defined as positive if a spot appeared in the E6+E7 and/or E6+E7+C14 IFN-γ ELISPOT assay, as well as in panel A and/or panel B of the T-SPOT.TB assay. By χ2 test, no significant difference was found between the two methods (P > 0.05) (also see Table 5).