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Table 1 Definition and descriptive statistics of explanatory variables

From: Spatiotemporal impacts of human activities and socio-demographics during the COVID-19 outbreak in the US

Variables Definitions Mean S.D. VIF
Demographic
POPD Population density (per square km) 1210.83 4374.67 2.53
OLDP The percentage of older population (%) 15.56 4.40 1.65
BLAP The percentage of black population or African American population (%) 12.09 12.95 2.29
ASIP The percentage of Asian population (%) 3.89 4.48 2.14
LATP The percentage of Hispanic Latino population (%) 15.53 16.31 2.07
Socioeconomic
BDHP Percentage of population having at least bachelor’s degree (%) 31.26 10.71 7.11
MHIC Yearly mean household income ($) 82836 21101 6.68
CLUE Citizen labor force unemployment rate (%) 5.91 1.81 2.45
Travel
MILE Public road mileage (meter) 5238.21 5128.13 1.32
WFHP Percentage of population work at home (%) 4.83 1.88 2.21
PTAP Percentage of population taking public transit (%) 3.09 6.86 2.09
MTAT Mean commuting time (minutes) 24.94 5.01 2.60
Human Activity
GPPC Change of grocery and pharmacy activity (%) -3.03 10.80 3.27
WOPC Change of workplace activity (%) -27.70 14.49 4.74
TSPC Change of transit stations activity (%) -19.06 23.27 2.24