Positive Negative Total
Positive 81 67 148
Negative 8 48 56
Total 89 115 204
ELISA
(index test)
Sensitivity ( 95 % CI) =91.0% (83.3 % - 95.4%)
Specificity (95 % CI) =41.7% (33.1% - 50.9%)
Likelihood ratio positive (95% CI) =1.6 (1.3-1.9)
Likelihood ratio negative (95% CI) =0.2 (0.1-0.4)
Table 4: Performance of rESAT-6-CFP-10 antigen in the diagnosis of pulmonary TB in Ethiopia.