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Agreement between the in vitro measurement of IFN-γ with PPD stimulation using the Q-IFN kit and PPD-ST induration
| PPDST group (n) | In vitro QuantiFERON-TB resulta
|
Cohen's kappa | Median % HuPPD (interquartile range) | ||
|---|---|---|---|---|---|
| TB+ | TB− | MAC+ | |||
| Positive (20) | 16 | 3 | 1 | 56.5 (103.1) | |
| 0.73 | |||||
| Negative (20) | 2 | 16 | 2 | 7.9 (11.9) | |
| Prior positive, (8) now negative | 8 | 0 | 0 | 41.8 (57.5) | |
Plus sign, positive; minus sign, negative; TB, tuberculosis.
