Table 2.
Performances of real‐time PCR assays for detection of Mycobacterium tuberculosis depending on culture results
| PCR Assay | MTB growth | MTB no growth | Sensitivity%, (95% CI) | Specificity %, (95% CI) | |||
|---|---|---|---|---|---|---|---|
| PCR + | PCR − | PCR + | PCR − | ||||
| All | AdvanSure | 49 | 5 | 11 | 78 | 90.7 (79.7‐96.9) | 87.6 (79.0‐93.7) |
| PowerChek | 50 | 4 | 13 | 76 | 92.6 (82.1‐97.9) | 85.4 (76.3‐92.0) | |
| Smear + | AdvanSure | 34 | 1 | 2 | 14 | 97.1 (85.1‐99.9) | 87.5 (61.7‐98.5) |
| PowerChek | 34 | 1 | 2 | 14 | 97.1 (85.1‐99.9) | 87.5 (61.7‐98.5) | |
| Smear − | AdvanSure | 15 | 4 | 9 | 64 | 78.9 (54.4‐94.0) | 87.7 (77.9‐94.2) |
| PowerChek | 16 | 3 | 11 | 62 | 84.2 (60.4‐96.6) | 84.9 (76.6‐92.2) | |
CI, confidence interval; MTB, Mycobacterium tuberculosis.