TABLE 1.
Performance of the Xpert MRSA/SA SSTI assay in 135 endotracheal aspirates compared to quantitative and qualitative cultures
| Type of culture | No. of positive samples/total no. of samples, % (95% confidence interval)a |
|||
|---|---|---|---|---|
| Sensitivity | Specificity | PPV | NPV | |
| Quantitative | 98/99, 99.0 (96.5–100.0) | 26/36, 72.2 (56.2–88.2) | 98/108, 90.7 (84.8–96.7) | 26/27, 96.3 (87.3–100.0) |
| Qualitative | 105/106, 99.1 (96.7–100.0) | 26/29, 89.7 (76.9–100.0) | 105/108, 97.2 (93.7–100.0) | 26/27, 96.3 (87.3–100.0) |
a
PPV, positive predictive value; NPV, negative predictive value.