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

Table 4

Interferon-gamma responses for mitogen according to CD4⁺ T cell count category in HIV-infected patients without active TB disease and healthy controls.

	<49/𝜇L	50–199/𝜇L	200–499/𝜇L	>500/𝜇L	Healthy controls
Number	27 a	22	35	11	29
Mean	7.48	13.50	16.08	20.40	19.27
S.D.	7.03	5.60	5.17	3.20	5.06
Median	5.55	15.51	16.91	20.21	20.03
Maximum	22.93	20.51	23.19	25.18	26.31
Minimum	0.14	0.67	0.25	15.56	5.12

S.D.: standard deviation.
a. 2 of 29 cases were omitted because negative control value was higher than response to mitogen.