Table 4 Performance parameters of magnetic bead FM following blinded re-checking of discrepant results, compared with culture on MGIT 960 and Lowenstein-Jensen medium
| Â | Â | Culture (MGIT + LJ) | ||
|---|---|---|---|---|
| Â | Â | Positive | Negative | Total |
Magnetic bead FM (with blinded re-checking of discrepants) | ||||
| Â | Positive | 76 | 12 | 88 |
| Â | Negative | 31 | 163 | 194 |
| Â | Total | 107 | 175 | 282 |
Sensitivity, % (95% CI) | 71.0% (61.5 - 79.4) | |||
Specificity, % (95% CI) | 93.1% (88.3 - 96.4) | |||
Overall accuracy, % (95% CI) | 84.8% (80.0-88.7) | |||
PPV, % (95% CI) | 86.4% (77.4-92.8) | |||
NPV, % (95% CI) | 84.0% (80.0-88.7) | |||