Table 1. Estimated true prevalence, sensitivity and arithmetic mean egg counts from the 615 participants with complete baseline data according to the four different diagnostic methods.
| A. lumbricoides | Hookworm | T. trichiura | ||
|---|---|---|---|---|
| Estimated true | Prevalence | 64.0 (62.2–67.1) | 54.8 (53.1–57.9) | 94.7 (94.0–96.0) |
| Eggs per gram of stool | 18125 (15024–21724) | 474 (402–558) | 1999 (1762–2252) | |
| Single Kato-Katz | No. of positive participants (%) | 347 (56.4) | 288 (46.8) | 553 (89.9) |
| Eggs per gram of stool | 14361 (12099–16622) | 509 (415–603) | 1760 (1517–2003) | |
| Sensitivity | 87.8 (83.6–90.7) | 85.5 (80.4–88.1) | 94.8 (93.3–95.6) | |
| Duplicate Kato-Katz | No. of positive participants % | 353 (57.4) | 299 (48.6) | 559 (90.9) |
| Eggs per gram of stool | 14175 (11866–16485) | 474 (391–556) | 1725 (1489–1961) | |
| Sensitivity | 89.8 (85.6–92.3) | 89.1 (84.0–91.6) | 96.1 (94.7–96.7) | |
| Quadruplicate Kato-Katz | No. of positive participants (%) | 384 (62.4) | 330 (53.7) | 579 (94.2) |
| Eggs per gram of stool | 13478 (11435–15521) | 434 (359–508) | 1796 (1544–2048) | |
| Sensitivity | 97.7 (93.1–99.9) | 98.3 (92.7–99.9) | 99.5 (98.1–99.9) | |
| FECPACKG2 | No. of positive participants (%) | 297 (48.3) | 240 (39.0) | 383 (62.3) |
| Eggs per gram of stool | 3048 (2501–3595) | 245 (197–293) | 171 (148–194) | |
| Sensitivity | 75.6 (72.0–77.7) | 71.5 (67.4–95.3) | 65.8 (64.9–66.2) | |
| Specificity | 96.9 (94.8–98.9) | 91.3 (89.3–93.1) | 95.3 (91.8–97.6) |
Numbers in brackets show 95% confidence interval, unless otherwise indicated