Table 5.
Characteristics of schools mapped by CCA* and Kato-Katz, overall and by zone
| Zone | ALL | E | NE | NW | Plateau | SW |
|---|---|---|---|---|---|---|
| Number of schools | 170 | 25 | 33 | 55 | 31 | 26 |
| Number of pupils | 8,482 | 1,248 | 1,650 | 2,742 | 1,542 | 1,300 |
| Proportion girls (excluding missing) | 50.0 | 49.9 | 50.2 | 49.7 | 50.3 | 50.1 |
| Number missing sex | 51 | 0 | 0 | 0 | 50 | 1 |
| Mean age (SD) | 13.25 (0.81) | 13.28 (0.68) | 13.42 (0.73) | 13.13 (0.86) | 13.42 (0.70) | 13.07 (0.93) |
| Number missing age | 0 | 0 | 0 | 0 | 0 | 0 |
| Number CCA 0* | 4,981 | 707 | 955 | 1,461 | 1,012 | 846 |
| Number CCA 1 (trace) | 2,574 | 431 | 532 | 863 | 469 | 279 |
| Number CCA 2 | 588 | 80 | 132 | 249 | 40 | 87 |
| Number CCA 3 | 175 | 16 | 23 | 77 | 18 | 41 |
| Number CCA 4 | 164 | 14 | 8 | 92 | 3 | 47 |
| Number KK uninfected | 8,353 | 1,237 | 1,648 | 2,668 | 1,542 | 1,258 |
| Number KK light infection | 110 | 9 | 1 | 63 | 0 | 37 |
| Number KK moderate infection | 18 | 2 | 1 | 11 | 0 | 4 |
| Number KK heavy infection | 1 | 0 | 0 | 0 | 0 | 1 |
| Percentage of children with infection: CCA trace negative (school IQR) | 10.9 (2.0–14.0) | 8.8 (2.0−14.0) | 9.9 (2.0−16.0) | 15.2 (4.0–21.0) | 4.0 (0.0–6.0) | 13.5 (2.0–13.5) |
| Percentage of children with infection: CCA trace positive (school IQR) | 41.3 (26.0–58.0) | 43.3 (28.0–60.0) | 42.1 (30.0–56.0) | 46.7 (36.0–59.0) | 34.4 (16.0–49.0) | 34.9 (18.0–47.5) |
| Percentage of children with infection: Kato-Katz (school IQR) | 1.5 (0.0–0.0) | 0.9 (0.0–0.0) | 0.1 (0.0–0.0) | 2.7 (0.0–1.0) | 0.0 (0.0–0.0) | 3.2 (0.0––4.0) |
| Mean intensity of infection: KK (epg; SD) | 0.85 (10.86) | 0.57 (8.07) | 0.12 (3.94) | 1.44 (12.29) | 0 (0) | 1.84 (19.13) |
| Percentage of schools with infection: CCA trace negative | 82.4 | 88.0 | 81.8 | 89.1 | 71.0 | 76.9 |
| Percentage of schools with infection: CCA trace positive | 97.6 | 100.0 | 100.0 | 100.0 | 90.3 | 96.2 |
| Percentage of schools with infection: Kato-Katz | 15.9 | 12.0 | 3.0 | 25.5 | 0.0 | 34.6 |
CCA = circulating cathodic antigen point-of-care urine cassette assay; epg = eggs per gram; KK = Kato-Katz stool assay; SD = standard deviation of the mean; IQR = interquartile range.
*
CCA 0 indicates a negative test, CCA 1 indicates a trace result, CCA 2 indicates a 1 + reading, CCA 3 indicates a 2 + reading, CCA 4 indicates a 3 + reading.