Diagnostic method | |||||
---|---|---|---|---|---|
Parameters | Direct microscopy | Concentrated microscopy | rpoB | IS6110 | D-PCR |
Number of samples negative | 77 | 75 | 66 | 63 | 62 |
Number of samples positive | 46 | 48 | 57 | 60 | 61 |
Measures of diagnostic accuracy | |||||
Sensitivity (%) | 86.3 | 90.2 | 88.2 | 92.2 | 94.1 |
Specificity (%) | 97.2 | 97.2 | 83.3 | 81.9 | 81.9 |
PPV | 0.96 | 0.96 | 0.79 | 0.78 | 0.79 |
NPV | 0.91 | 0.93 | 0.91 | 0.94 | 0.95 |
LR+ | 30.8 | 32.2 | 5.3 | 5.1 | 5.2 |
LR- | 0.14 | 0.1 | 0.14 | 0.1 | 0.07 |