Appendix Table 12.

Results of linear regression showing percentage change in the total death rate, Black death rate, White death rate, and ratio of Black to White age-adjusted COVID-19 death rates for each one standard deviation increase in the percentage Black population in a county, 95% confidence intervals (CI), and P values in bivariate models (N=353 counties)

Outcome variable	Percent change in outcome variable for each one standard deviation increase in percent Black population	95% CI	P value
Overall COVID-19 death rate	+10.9%	+5.5% to 16.6%	<0.001
Black COVID-19 death rate	+2.0%	-3.3% to +7.5%	0.472
White COVID-19 death rate	+9.1%	+3.3% to +15.2%	0.002
Ratio of Black to White COVID-
19 death rate	-6.5%	-2.5% to -10.3%	0.002