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. 2021 Dec 29;13:100528. doi: 10.1016/j.trip.2021.100528

Table 3.

Direct and total effects of variables on COVID infection rate (N = 3,140).

Structural model Unstandardized coefficient
Standardized coefficient
Direct effect Total effect Direct effect Total effect
Outcome: COVID-19 infection rate
Predictors
Human mobility 20.116*** 18.191*** 0.273*** 0.246***
Socio-demographic characteristics
Age 18–24 years 6.388*** 1.060 0.090*** 0.015
Age 25–44 years 16.377*** 5.752*** 0.220*** 0.077***
Age 45–64 years −1.437 −3.358* −0.017 −0.039*
Age 65 years and older −4.117** −7.411*** −0.078** −0.141***
African-Americans 1.936*** 2.275*** 0.115*** 0.135***
Male −13.115*** −4.604** −0.128*** −0.045**
People in labor force --- 1.408*** --- 0.035***
HH with internet access --- −1.607*** --- −0.058***
Location characteristics
Number of points of interest --- −0.002*** --- −0.039***
Presence of airport --- −0.266*** --- −0.039***
Metropolitan status 0.500*** 0.332*** 0.099*** 0.066***
COVID-19 status
a Susceptible Infected (SI) 0.0003*** 0.0002*** 0.150*** 0.136***
b Spatial effect 0.051*** 0.046** 0.314*** 0.284**
COVID-19 policies
Emergency declaration --- −1.406*** --- −0.017***
Gathering restriction --- −0.029*** --- −0.002***
Stay at home order 2.942*** 1.856*** 0.198*** 0.125***
Non-essential business closure --- −0.606** --- −0.013**
Public mask mandate −0.477* −0.431* −0.037* −0.034*
Quarantine mandate 0.145 0.132 0.013 0.012

Notes: --- denotes no direct connections. *, **, and *** indicate statistical significance at 10%, 5%, and 1% respectively.

All the COVID-19 policy variables represent the number of days from the first enactment of policies until May 1, 2020

a

Susceptible Infected (SI) = number of susceptible people (people who have not been infected with the virus yet) × number of currently infected people in that population (current active cases).

b

Spatial effect = number of average COVID-19 daily new cases per 100 K population in neighboring counties × average number of daily external trips by infectious persons from out of state or county (Imported cases)