Multilevel and geo-statistical modeling of malaria risk in children of Burkina Faso

Parasites & Vectors

Table 1 Overview of data sources for the climatic and environmental variables

Variables	Time period (Resolution)	Spatial resolution	Source
Minimum temperature*	Average of 1950-2000	~1 km	Global Climate Data http://www.worldclim.org
Average temperature
Maximum temperature*
Mean diurnal range in temperature
Average monthly rainfall
Precipitation seasonality
Altitude	2000
NDVI^†	2001-2010 (5 days)	250 m	US Geological Survey http://earlywarning.usgs.gov/
Rainfall before the survey	2010 (10 days)	~8 km	US Geological Survey http://earlywarning.usgs.gov/
MODIS VCF^§	2010	~250 m	Global Land Cover Facility http://glcf.umd.edu/data/vcf/
Distance to roads^††	1998	Vector	DIVA-GIS http://www.diva-gis.org/
Distance to water bodies^††	1998	Vector	Food and Agriculture Organization http://www.fao.org/geonetwork/srv/en/main.home
Population density	2010	~5 km	Gridded Population of the World (v3) http://sedac.ciesin.columbia.edu/data/collection/gpw-v3

Unless stated otherwise, the variables described above were linked to the Demographic and Health Survey (DHS) records by assigning them the information corresponding to the geographic location of the DHS clusters’ centroid.
*Averages computed for minimum temperatures of the coldest month and maximum temperatures of the warmest month.
^†NDVI: Normalized-Difference Vegetation Index.
^§VCF: Vegetation Continuous Field.
^††Distance to roads and water bodies were obtained by calculating the Euclidian distance from the DHS cluster’ centroid to the closest road and water body.

ISSN: 1756-3305