Performance of a Whole-Blood Interferon-Gamma Release Assay with Mycobacterium RD1-Specific Antigens among HIV-Infected Persons

Table 2

Relationship between TST results and CD4⁺ T cell count.

CD4^+ T cell count/𝜇L	Presence of active TB disease^∗	TST positive	TST negative
<200 [<50]	Y (𝑛=6)	3 (50%) [1]^∗	3 (50%) [2]^∗
	N (𝑛=6)	1 (17%) [0]^∗	5 (83%)[3]^∗
≥200	Y (𝑛=0)	0	0
	N (𝑛=11)	3 (27%)	8 (73%)

Y: present, N: absent.
(%): percentage of Y or N number in each CD4 category.
^∗[] indicates the number of those with CD4⁺ T cells less than 50.