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Accuracy and reliability of the MGIT compared with the BACTEC 460TB system for the four drugs tested
| Druga | Specificity (%) | Sensitivity (%) | NPVb (%) | PPVc (%) | Accuracy |
|---|---|---|---|---|---|
| INH | 100 | 97.6 | 99.1 | 100.0 | 0.99 |
| RMP | 100 | 95.8 | 99.9 | 100.0 | 0.99 |
| EMB | |||||
| Expt 1 | 99.0 | 86.5 | 97.7 | 93.8 | 0.97 |
| Expt 2 | 99.2 | 92.9 | 98.5 | 96.3 | 0.98 |
| SM | 99.4 | 98.2 | 99.4 | 98.2 | 0.99 |
Drugs were used at the concentrations given in Table 2, footnote a.
NPV, negative predictive value.
PPV, positive predictive value.
