Spatial distribution and populations at risk of A. lumbricoides and T. trichiura co-infections and infection intensity classes: an ecological study

Table 5 Predicted number of school-aged children with mono- and co-infection in the Philippines, 2017

Total population for 2015 (millions)^a	Annual population growth rate for 2015–2020 (%)^b	Total population for 2017 (millions)^c	% of individuals aged 5–19 yrs^b	Region	Number of school-aged children with infection (thousands)^d
					Mono- and co-infections			Infection intensity classes
					Mono-Asc	Mono- Tric	Co-infection	Light-Asc	Moderate/high-Asc	Light- Tric	Moderate/high-Tric
100.7	1.48	103.7	30.2	National	114.9	125.2	147.9	–	–	–	–
				Luzon	68.5	75.7	89.4	–	–	–	–
				The Visayas	22.4	32.7	38.3	–	–	–	–
				Mindanao	24.0	16.8	20.2	15.4	8.3	18.5	6.6

^aSource: Alpha version 2015 estimates of numbers of people/km², with national totals adjusted to match UN population division estimates (https://esa.un.org/wpp/) and remaining unadjusted; Spatial resolution: 0.000833333 decimal degrees (approx. 100 m at the equator); Projection: Geographic, WGS84; Date of production: November 2013 [34, 42]
^bSource: The World Population Prospects 2015 Revision Population Database [35, 43]
^cEstimated value based on the ArcGIS Map algebra raster calculator; 2015 population raster map (the AsiaPop Project) was multiplied by the annual population growth rate for 2015 to 2020
^dEstimated value based on the ArcGIS Map algebra raster calculator; 2017 population raster map was multiplied by the proportion of the Filipino population aged 5–19 years to derive a map of the number of school-aged children aged 5–19 years in 2017 in each grid cell. We then multiplied the map of the total population aged between 5–19 years by our prediction maps of the prevalence of A. lumbricoides monoinfection, T. trichiura monoinfection, and A. lumbricoides and T. trichiura co-infection, and the predicted prevalence of infection intensity classes in ArcGIS software (ESRI 2013. ArcGIS Desktop: Release 10. Redlands, CA: Environmental Systems Research Institute
Abbreviations: Asc A. lumbricoides; Tric T. trichiura

ISSN: 1756-3305