Table 2 Concordance (coefficient kappa) and accuracy analysis between Kato-Katz test results obtained by an increasing number of slides and the results of one rapid urine test sample (POC-CCA)
POC-CCA | Kato-Katz 1S 1st AS | Kato-Katz 6S 3SA | Kato-Katz 16S 3SA | ||||||
|---|---|---|---|---|---|---|---|---|---|
Positive | Negative | Total | Positive | Negative | Total | Positive | Negative | Total | |
Positive | 5 | 84 | 89 | 14 | 75 | 89 | 23 | 66 | 89 |
Negative | 4 | 279 | 283 | 10 | 273 | 283 | 12 | 271 | 283 |
Total | 9 | 363 | 372 | 24 | 348 | 372 | 35 | 337 | 372 |
Sensitivity | 55.6% (95% CI: 26.6–81.1) | 58.3% (95% CI: 38.8–75.5) | 65.7% (95% CI: 49.1–79.1) | ||||||
Specificity | 76.9% (95% CI: 72.2–80.9) | 78.4% (95% CI: 73.8–82.4) | 80.4% (95% CI: 75.8–84.3) | ||||||
PPV | 6.0% (95% CI: 2.4–12.5) | 16.0% (95% CI: 9.6–24.6) | 26.0% (95% CI: 17.9–37.0) | ||||||
NPV | 98.6% (95% CI: 96.4–99.4) | 96.5% (95% CI: 93.6–98.1) | 95.8% (95% CI: 92.7–97.6) | ||||||
Kappa index | 0.06 (95% CI: 0.01–0.1) | 0.16 (95% CI: 0.1–0.2) | 0.27 (95% CI: 0.2–0.3) | ||||||
Accuracy | 76.0% (95% CI: 74.6–82.8) | 77.0% (95% CI: 72.6–81.1) | 79.0 79.0% (95% CI: 74.6–82.8) | ||||||