Table 2.

Performance of tuberculosis (TB) ELISPOT assay for diagnosis of active tuberculosis in HIV-1 infected patients stratified by CD4 T cell count.

Patient group	No.	Sensitivity (%)	Specificity (%)
All HIV patients with active/probable TB	30	90·3	100
CD4 T cell count < 300 cells/µl	22	95·4	100
CD4 T cell count < 200 cells/µl	14	92·9	100
CD4 T cell count < 100 cells/µl	8	87·5	100