Table 4 Showing the performance measures of Kato-Katz by each survey round with POC-CCA as the gold standard
Treatment round | Sensitivity %(95% CI) | Specificity %(95% CI) | LR+ %(95% CI) | LR− %(95% CI) | PPV %(95% CI) | NPV %(95% CI) | Kappa index (Agreement %) |
|---|---|---|---|---|---|---|---|
Pre-treatment | 12.5 (9.7–15.8) | 97.9 (97.0–98.6) | 6.0 (3.8–9.3) | 0.9 (0.9–0.9) | 69.0 (58.1–78.5) | 75.0 (72.8–77.0) | 0.14 (74.7%) |
Post-treatment | 5.2 (3.2–7.9) | 99.5 (99.0–99.8) | 10.6 (4.5–24.8) | 1.0 (0.9–1.0) | 74.1 (53.7–88.9) | 79.5 (77.6–81.4) | 0.07 (79.4%) |
Overall P-value** | 9.3 (7.4–11.4) Χ2m = 782.0, p < 0.001 | 98.7 (98.2–99.1) Χ2m = 34.0, p < 0.001 | 7.4 (5.0–10.92) - | 0.9 (0.9–0.9) - | 70.2 (60.9–78.4) - | 77.3 (75.9–78.7) - | 0.11 (77.1%) Z = 11.6, p < 0.001 |