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Table 1 Descriptions of the indicators for influencing factors

From: The superposition effects of air pollution on government health expenditure in China— spatial evidence from GeoDetector

Respects Variable Code Unit Data sources
Dependent variable Government health expenditure GHE 104 Yuan the Statistical Yearbook of the prefecture-level cities in 2017
Socioeconomic factors Gross Domestic Product GDP 108 Yuan the Statistical Yearbook of the prefecture-level cities in 2017
Urbanisation level UL Percent the Statistical Yearbook of the prefecture-level cities in 2017
Proportion of Secondary Industry PSI Percent China Urban Statistical Yearbook – 2018
Health factors Number of Hospital Beds NHB Beds China Urban Statistical Yearbook – 2018
Number of hospitals NH Hospitals the Statistical Yearbook of the prefecture-level cities in 2017
Number of doctors ND Person China Urban Statistical Yearbook – 2018
Policy factors Integration of urban and rural residents’ medical insurance IURMI / Human resources and social security websites of cities
Proportion of government health care expenditure in GDP PGH Percent the Statistical Yearbook of the prefecture-level cities in 2017
Environmental factors Annual average temperature AT Centigrade the Statistical Yearbook of the prefecture-level cities in 2017
Annual rainfall AR Millimeter the Statistical Yearbook of the prefecture-level cities in 2017
Industrial sulfur dioxide Emissions ISDE 104 Tons China Urban Statistical Yearbook – 2018
Population factor Population density PD 104 person per square kilometer WorldPOP gridded population datasets