Table 7.

Kappa Statistic for Various Cut-Points of the TST and QFT Test among the Foreign-Born U.S. Population 6 Years of Age and Older

	TST 5 mm	TST 10 mm	TST 15 mm
QFT 0.35 IU	0.29 (0.27–0.32)	0.38 (0.33–0.44)	0.34 (0.32–0.36)
QFT 0.7 IU	0.28 (0.25–0.30)	0.38 (0.34–0.43)	0.35 (0.33–0.37)
QFT 1.0 IU	0.25 (0.23–0.27)	0.36 (0.34–0.38)	0.34 (0.32–0.36)

Definition of abbreviations: QFT = QuantiFERON-TB Gold In-Tube test; TST = tuberculin skin test.