Table 2.
Village-level enviro-geographic, baseline epidemiological, and treatment features
| Predictor | Source | Data processing |
|---|---|---|
| Treatment arm | Schistosomiasis Consortium for Operational Research and Evaluation standardized dataset | |
| Year 1 prevalence (%) | ||
| Year 1 infection intensity (mean eggs per gram of stool (S. mansoni) or 10-mL urine (S. mansoni) | ||
| Distance to freshwater (km) | Kummu et al.28 | Mean value within 1 km of village coordinates computed |
| Travel time to a major* urban center (hours) | Weiss et al.29 | Mean value within 1 km of village coordinates computed |
| Population density (population per km2) | WorldPop30 | Mean value within 1 km of village coordinates computed |
| Agricultural land cover (%) | GlobCover31 | Value within 1 km of village coordinates computed |
| Altitude (m) | NASA SRTM32 | Mean value within 1 km of village coordinates computed |
| Absolute rainfall: average 3-month rainfall (mm), 2012–2016 | Africa Rainfall Climatology (ARC) 2.027 | Methods described in text. Spatially accurate within 0.1 decimal degrees, the resolution of the rainfall dataset |
| Relative rainfall: median Z-score of 3-month rainfall from historical baseline, 2012–2016 | ARC 2.027 | Methods described in text. Spatially accurate within 0.1 decimal degrees, the resolution of the rainfall dataset |
S. mansoni = Schistosoma mansoni.
* Population of 50,000 or greater.