We checked the robustness of our findings, first by substituting the GSNI for the GII in our regression analysis (Table A5). GII and GSNI values were highly correlated (Figure A3) and, as expected, these regressions produced results very similar to those shown…

We also performed 2 sensitivity analyses. The first sensitivity analysis accounted for differences in ... The second sensitivity analysis examined whether ... Comparison of Estimated Rates of Coronavirus Disease 2019 (COVID-19) in Border Counties in Iowa Witho…