Table 3. Prevalence of schistosomiasis using rapid diagnostic tests for each province and comparisons with the baseline survey.
| Impact assessment | Prevalence comparison for any schistosomiasis | |||||
|---|---|---|---|---|---|---|
| Schools / Students | Schistosoma mansoni | Schistosoma haematobium | Any schistosomiasis | Any schistosomiasis at baseline | Relative prevalence reduction | |
| N/N | % (95%CI) | % (95%CI) | % (95%CI) | % (95%CI) | % (95%CI) | |
| Huambo | 221/6,591 | 23.1 (20.8, 25.5) | 9.4 (7.9, 11.1) | 29.6 (27.1, 32.2) | 36.4 (33.1, 39.8) | 18.8 (8.6, 29.0) |
| Uige | 266/7,963 | 29.6 (26.6, 32.8) | 7.8 (6.5, 9.4) | 35.4 (32.5, 38.5) | 18.4 (15.8, 21.4) | -92.3 (-126.2, -58.3) |
| Zaire | 112/3,326 | 19.7 (16.5, 23.3) | 13.2 (9.2, 18.4) | 28.2 (23.6, 33.4) | 24.8 (18.9, 31.7) | -14.0 (-48.6, 20.6) |
Prevalence calculations based on rapid diagnostic tests (considering trace readings as positive) and adjusted for clustering at school level. Relative prevalence reduction = (2014 prevalence– 2021 prevalence) / 2014 prevalence; negative values represent a relative increase in prevalence and positive values represent a relative reduction in prevalence. CI = confidence interval. N = number surveyed.