Table 3.
Concordance of T-Track® TB and QFT-Plus assays on samples of active TB patients.
| T-Track® TB Result (n) |
QFT-Plus Result (n) | Agreement % (95% CI) | Kappa Value (95% CI) |
||||
|---|---|---|---|---|---|---|---|
| Positive | Negative | Total | Overall Percent Agreement |
Positive Percent Agreement |
Negative Percent Agreement |
||
|
Positive
Negative Total |
146 2 148 |
19 7 26 |
165 9 174 |
87.9 (82.2–92.0) |
98.7 (94.9–99.9) |
26.9 (13.5–46.3) |
0.35 (0.15–0.56) |
Abbreviations: CI, confidence interval; QFT-Plus, QuantiFERON®-TB Gold Plus; TB, tuberculosis.