Comparison of the Performance of Urinary Mycobacterium tuberculosis Antigens Cocktail (ESAT6, CFP10, and MPT64) with Culture and Microscopy in Pulmonary Tuberculosis Patients

Table 2

Sensitivity – specificity for AFB stain and Urinary Mtb antigens cocktail among Pulmonary Tuberculosis Patient, against Mycobacterial Culture.

Variable	Mtb culture Positive; ()	Mtb culture Negative; ()	Sn; (%)	Sp; (%)	PPV (%)	NPV; (%)
AFB stain
(i) Positive	20	32	45.4	67	38.5	73
(ii) Negative	24	65
Mtb antigen cocktail
(i) Positive	36	59	71	35	37.9	69.6
(ii) Negative	14	32
Combined AFB AND/OR Cocktail
(i) Positive	45	65	90	28.6	40.9	83.8
(ii) Negative	5	26

Abbreviations. AFB, acid-fast bacilli; Mtb, Mycobacterium tuberculosis; Sn, sensitivity; Sp, specificity; PPV, positive predictive value; NPV, negative predictive value.