Table 3. Qualitative comparison of CLIA-IGRA and QFT-GIT assay results in health care workers and patients (N=341).
| CLIA-IGRA | QFT-GIT | % Agreement (95% CI) | Kappa coefficient | ||||
|---|---|---|---|---|---|---|---|
| Positive (N=197) | Indeterminate (N=1) | Negative (N=143) | Positive | Negative | Overall | ||
| Positive (N = 194) | 194 | 0 | 0 | 98.48 (95.25–99.61) | 97.95 (93.65–99.47) | 99.12 (97.23–99.77) | 0.98 (0.96–1.00) |
| Indeterminate (N = 1) | 0 | 1 | 0 | ||||
| Negative (N = 146) | 3 | 0 | 143 | ||||
Abbreviations: CLIA-IGRA, chemiluminescent immunoanalyzer-based interferon gamma releasing assay; QFT-GIT, QuantiFERON-TB Gold In-Tube; CI, confidence interval.