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Determination of RIF resistancea
| Source of isolates (n) | No. of isolates with indicated results (reference, PCR/ESI-MS) |
Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | |||
|---|---|---|---|---|---|---|---|---|
| R, R | R, S | S, R | S, S | |||||
| New York (962) | 238 | 9 | 8 | 707 | 96.4 | 98.9 | 96.7 | 98.7 |
| Georgia (188) | 16 | 0 | 4 | 168 | 100 | 97.7 | 80.0 | 100 |
| South Africa (190) | 125 | 5 | 1 | 59 | 96.2 | 98.3 | 99.2 | 92.2 |
| All isolates (1,340) | 379 | 14 | 13 | 934 | 96.4 | 98.6 | 96.7 | 98.5 |
R, resistant; S, susceptible; PPV, positive predictive value; NPV, negative predictive value.
