Tuberculin Skin Tests versus Interferon-Gamma Release Assays in Tuberculosis Screening among Immigrant Visa Applicants

Table 2

Mean, median, and interquartile range for TB response.

	Negative QFT-G	Positive QFT-G
Count	811	352
Mean (IU/mL)	0.05	3.91
Median (IU/mL)	0.30	1.53
Interquartile range (IU/mL)	0.10	3.60

QFT-G: QuantiFERON-TB Gold test.