Table 3. Concordance of TST and QFT-GIT results among referred individuals that came to BCHD for LTBI evaluation and had both tests performed.

	TST negative	TST positive	Total
QFT-GIT negative	4 (1%)*	164 (47%)	168
QFT-GIT positive	4 (1%)*	179 (51%)	183
QFT-GIT indeterminate	0	1 (0.25%)	1
Total	8	344	352†

^†Overall, 352 individuals had a TST and interpretable QFT-GIT result available. There was an overall concordance of 52.3%.

^*8 individuals with negative TST results were referred and evaluated by BCHD. 4 individuals with B-waivers had negative TST, but were referred due to an abnormal CXR; 4 individuals had both TST and QFT-GIT performed by referral source.