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Qualitative evaluation of the Liaison XL for the performance of the QuantiFERON-TB Gold Plus assay compared to ELISA resultsa
| QFT CLIA result | QFT ELISA result |
Level of concordance [% (95% CI)] | Kappa value (95% CI) | ||
|---|---|---|---|---|---|
| Positive | Indeterminate | Negative | |||
| Positive | 49 | 0 | 6 | 95.5 (92.7–97.5) | 0.872 (0.809–0.935) |
| Indeterminate | 0 | 14 | 1 | ||
| Negative | 0 | 8 | 255 | ||
Abbreviations: CI, confidence interval; CLIA, chemiluminescence immunoassay; ELISA, enzyme-linked immunosorbent assay.
