Table 4 Performance of Gazelle™ compared to microscopy and RDT with PCR as gold standard
n = 276 | Gazelle™ | Microscopy | RDT |
|---|---|---|---|
Sensitivity | 72.1 % 124/172 | 75.0 % 129/172 | 62.8 % 108/172 |
Specificity | 99.0 % 103/104 | 99.0 % 103/104 | 99.0 % 103/104 |
Positive predictive value | 99.2 % | 99.2 % | 99.1 % |
Negative predictive value | 68.2 % | 70.6 % | 61.7 % |
Likelihood ratio of a positive test | 75.0 | 78.0 | 65.3 |
Likelihood ratio of a negative test | 0.28 | 0.25 | 0.38 |
Accuracy (ROC analysis) | 82.3 % | 84.1 % | 76.5 % |