Head-to-head comparison of paired pleural fluid T-SPOT.®TB and QFT-TB-GIT results
| T-SPOT.®TB positive | T-SPOT.®TB negative | T-SPOT.®TB indeterminate | Total | |
| Definite TB# | ||||
| QFT-TB-GIT positive | 17 | 0 | 3 | 20 |
| QFT-TB-GIT negative | 12 | 3 | 0 | 15 |
| QFT-TB-GIT indeterminate | 0 | 1 | 0 | 1 |
| Total | 29 | 4 | 3 | 36 |
| Non-TB¶ | ||||
| QFT-TB-GIT positive | 2 | 1 | 0 | 3 |
| QFT-TB-GIT negative | 4 | 6 | 1 | 11 |
| QFT-TB-GIT indeterminate | 0 | 2 | 1 | 3 |
| Total | 6 | 9 | 2 | 17 |
Data are presented as n. TB: tuberculosis; QFT-TB-GIT: QuantiFERON®-TB Gold In-tube assay. The T-SPOT.®TB assay and QFT-TB-GIT were manufactured by Oxford Immunotec, Abingdon, UK and Cellestis, Carnegie, Australia, respectively. #: n = 36; κ = 0.21, 95% confidence interval (CI) -0.02–0.41, p = 0.03; agreement 56%. ¶: n = 17; κ = 0.20, 95% CI -0.27–0.67, p = 0.20; agreement 53%.