Table 2

Diagnostic performance of the ALS test^*

Groups	Latent TB cases (n=45)				Non-TB controls (n=40)
Groups	Sensitivity	Specificity	PPV	NPV	Sensitivity	Specificity	PPV	NPV
All TB cases
HIV negative	86	80	89	86	86	94	98	74
HIV positive	90	80	94	73	91	94	96	90
Pulmonary TB
HIV negative	80	80	79	88	80	94	95	81
HIV positive	86	80	85	89	90	94	92	94
Pleural TB
HIV negative	80	80	75	97	87	94	94	94
HIV positive	86	80	67	89	80	91	80	94
Lymph node TB
HIV negative	86	80	77	97	84	94	94	94
HIV positive	100	78	80	100	100	91	88	94

↵* Patients with active TB were compared with latent TB cases or non-TB controls.
ALS, Antibodies in Lymphocyte Supernatant; NPV, negative predictive value; PPV, positive predictive value; TB, tuberculosis.