An ecological study of chronic kidney disease in five Mesoamerican countries: associations with crop and heat

BMC Public Health

Table 2 Explanatory variable data sources

Variable	Spatial domain	Temporal domain	Data source
Population density	All countries	2010	WorldPop [26]
Ambient temperature	All countries	1970–2010	Worldclim [27, 28]
Crop cultivation	Mexico	2009–2012	Mexican government productivity data [29]
	Guatemala	2010	Guatemalan government land use map [30]
	Guatemala	2011–2013	Rice productivity [22]
	El Salvador	2007–2008	Agricultural Census [6]
	Nicaragua	2016	Sugarcane only: Land use map [31]
	Nicaragua	2011	Agricultural census [32]
	Costa Rica	2014	Agricultural census [33] and land use maps [34] for sugarcane

ISSN: 1471-2458