Smear Microscopy for Diagnosis of Pulmonary Tuberculosis in Eastern Sudan

Table 2

Expected positive predictive values of smear microscopy assuming a sensitivity of 55% in the context of passive case finding.

Positive predictive; value	Proportion with; smear positive TB	Specificity
75.3%	10%	98%
83.0%	15%	98%
87.3%	20%	98%
90.2%	25%	98%
86.0%	10%	99%
91.0%	15%	99%
93.2%	20%	99%
95.0%	25%	99%