Table 4.

Linear regression performance of sociodemographic variables explaining independently the variation in median COVID-19 infection rates data for the time period 28.10.2020–24.03.2021, and the total number of times each variable was selected to the OLS models out of a total of 11 regression models run for different 14-day time periods.

Predictor	Description	Adjusted R Square	Standard Error	Number of times selected to OLS models
hr_mtu	Median income of inhabitants, 2017	0.30	49.954	8
ulkoka19	Number of foreign citizens in residential building summed to postal code area	0.23	52.255	5
ko_perus	Basic level studies, 2018 – no qualification after basic level or qualification unknown	0.22	52.581	4
pt_tyott	Unemployed, 2017 – (people aged 15–64 years who were unemployed)	0.18	53.947	3
hr_pi_tul	Inhabitants belonging to the lowest income category, 2017	0.09	56.872	2
pt_elakel	Pensioners, 2017	0.04	58.477	2
tr_pi_tul	Households belonging to the lowest income category, 2017	0.11	56.097	1