Diagnosis of Pulmonary Tuberculosis in Resource Limited Setting of Rawalpindi

Table 1: Sensitivity, specificity, PPV and NPV of different diagnostic modalities (n=352).

-	-	Culture		(%)
-	-	Positive	Negative	Sensitivity	Specificity	PPV	NPV	Agreement
ZN Microscopy	Positive	49	02	39	99	96	63	14.5
ZN Microscopy	Negative	111	190	39	99	96	63	14.5
Fluorescent Microscopy	Positive	89	1	55	99	98	72	79
Fluorescent Microscopy	Negative	71	191	55	99	98	72	79
Gene Xpert	Positive	158	03	98	99	98	99	98
Gene Xpert	Negative	2	189	98	99	98	99	98

PPV: Positive Predictive Value, NPV: Negative Predictive Value.