Parasite associations predict infection risk: incorporating co-infections in predictive models for neglected tropical diseases

Table 1 Environmental and demographic predictor variables used in analysis

Predictor variable	Analysis resolution	Source
Net difference vegetation index (NDVI)	10 km	MODIS
Net difference water index (NDWI)	10 km	MODIS
Land surface temperature (LST)	10 km	MODIS
Elevation	10 km	Amazon web services
Surface soil moisture	10 km	NASA SMAP
Proportion of landcover classified as cropland (Categories 11 and 12)	10 km	MODIS
Human population density	10 km	Facebook Connectivity Laboratory and CIESIN
Proportion of human settlements classified as rural (Category 1)	10 km	Global human settlement layer
Proportion of households with electricity	District	DHS Malaria Indicator Survey
Proportion of households with access to flushable toilet	District	DHS Malaria Indicator Survey
Proportion of households with access to clean drinking water	District	DHS Malaria Indicator Survey

Notes: NDVI, NDWI, LST and surface soil moisture were calculated as post-rainy season averages (December to February). Other predictors included in analysis were the child’s age and sex

ISSN: 1756-3305