TABLE 4.

Positivity rates with QFT and QFT-Plus in 626 HCWs with no LTBI risk factors and no prior positive tests

Assay	No. of positives	Positivity rate [% (95% CI)]	P valuea
QFT	13	2.1 (1.0–3.2)
QFT-Plus	19	3.0 (1.7–4.3)	0.24
QFT-Plus TB1	10	1.6 (0.6–2.6)	0.58
QFT-Plus TB2	15	2.4 (1.2–3.6)	0.80
QFT-Plus-Cb	6	1.0 (0.2–1.7)	0.07

^aCompared with QFT using McNemar's test.

^bP value of 0.0002 compared with that of QFT-Plus.