Table 3 Cross tabulation of RDT with microscopy test results, and performance of the RDT
RDT (any band) | Microscopy | Total | RDT performance | |
|---|---|---|---|---|
Positive | Negative | |||
DR analysis | ||||
 Positive | 589 | 188 | 777 | Sensitivity = 589/626 * 100 = 94.1% |
 Negative | 37 | 479 | 516 | Specificity = 479/667 * 100 = 71.8% |
 Total | 626 | 667 | 1293 | PPV = 589/777 * 100 = 75.8% |
|  |  |  | NPV = 479/516 * 100 = 92.8% | |
Visual interpretation | ||||
 Positive | 585 | 184 | 769 | Sensitivity = 585/626 * 100 = 93.5% |
 Negative | 41 | 483 | 524 | Specificity = 483/667 * 100 = 72.4% |
 Total | 626 | 667 | 1293 | PPV = 585/769 * 100 = 76.1% |
|  |  |  | NPV = 483/524 * 100 = 92.2% | |