Table 2:
Sensitivity and specificity of swab testing by Xpert Ultra and MTB Ultima, based on all samples tested.
| Cohort | Sensitivity | Specificity | ||||||
|---|---|---|---|---|---|---|---|---|
| Xpert Ultra | MTB Ultima | Xpert Ultra | MTB Ultima | |||||
| N | Percent (95% CI) | N | Percent (95% CI) | N | Percent (95% CI) | N | Percent (95% CI) | |
| 1 | 71/100 | 71.0 (61.1, 79.6) | 58/89 | 65.2 (54.3, 75.0) | -* | -* | -* | -* |
| 2 | 113/144 | 78.5 (70.9, 84.9) | 103/136 | 75.7 (67.7, 82.7) | 72/72 | 100.0 (95.0, 100.0) | 62/64 | 96.9 (89.2, 99.6 |
| 1+2 | 184/244** | 75.4 (69.5, 80.7) | 161/225** | 71.6 (65.2, 77.4) | 72/72** | 100.0 (95.0, 100.0) | 62/64** | 96.9 (89.2, 99.6 |
*
Cohort 1 consisted entirely of TB-positive participants by sputum MRS
**
Totals fell below the total enrollment of 320 participants due to invalid results, which differed between the two test platforms