Table 1.
Summary statistics from the three different datasets analyzed
| Dataset | POC-CCA mapping | POC-CCA and KK comparison | Assessment with CAA in Leiden | |
|---|---|---|---|---|
| Number of schools | 388 | 175 | 8 | |
| Number of pupils | 19,371 | 8,697 | 396 | |
| Age of pupils (years), mean (SD) | 13.4 (0.75) | 13.3 (0.75) | 13.4 (0.67) | |
| Percentage female | 50.1 | 49.9 | 50.0 | |
| Prevalence, % (school IQR) | CCA trace negative in Rwanda | 7.4 (0.0–8.0) | 8.6 (1.0–8.0) | 31.3 (32.0 –37.1) |
| CCA trace positive in Rwanda | 36.1 (20.0–47.0) | 37.5 (22.0–49.0) | 65.7 (64.0–78.5) | |
| Kato–Katz in Rwanda | – | 2.0 (0.0–0.0) | 8.1 (3.0–11.2) | |
| CCA trace negative in Leiden | – | – | 33.8 (25.5–47.8) | |
| CCA trace positive in Leiden | – | – | 55.8 (50.0–75.0) | |
| CAA in Leiden | – | – | 44.2 (31.0–63.5) | |
IQR = interquartile range; KK= Kato–Katz; POC-CCA = point-of-care circulating cathodic antigen. The 175 schools assessed by POC-CCA (CCA) and KK were a subset of the 388 schools assessed using POC-CCA, and the eight purposively selected schools also assessed by POC-CCA and CAA in Leiden were a subset of the 175 schools assessed with POC-CCA and KK in Rwanda. Variability between schools was reported as IQR of the school prevalence estimates. Note that 81% of schools sampled recorded no infections by KK.