Table 2.

Summary of the variables sources

Variables, definitions, and measurements	Source links
LNLEXP is the natural logarithm of life expectance at birth measured in years	https://databank.worldbank.org/source/world-development-indicators#
LNINFMOR is the natural logarithm of infant mortality rate per 1000 lives birth before 1 year old
PRUDN refers to the prevalence of undernourishment, indicating the % of the population whose habitual food consumption is insufficient to supply the dietary energy levels essential to living a normally active and healthy life
GDPPC is GDP per capita measured based on the 2010 US$ constant price
GOVEXP stands for domestic general government health expenditure (% of GDP)
URBAN refers to urbanization measured as urban population (% of the total population)
MNSCHOOL is mean years of schooling	http://hdr.undp.org/en/data
AVRDES is the average dietary energy supply adequacy measured as % (3-year average)	https://knoema.com/FAOFSD2020/fao-food-security-data?location=1000180-sub-saharan-africa