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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/L 50–199/L 200–499/L 500/L 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.