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METHODS

The authors used data from the 2018 Behavioral Risk Factor Surveillance System, a nationally representative survey of> 400,000 adults. This study estimated the proportion of adults that have at least one of the Centers for Disease Control and Prevention criteria for risk of severe illness from COVID-19 (referred to as higher risk for the remainder of this paper)(Appendix Table 1, available online) by age group, race/ethnicity, and household income (< $25,000 or not), accounting for comorbidities. In each age group, the proportion with more than 1 risk factor was also estimated, recognizing the potential for compounding risk. Prevalence ratios (PRs) and 95% CIs were estimated for race/ethnicity and income group using Poisson regression models with robust SEs. The authors excluded those who responded don't know/not sure or refused or had missing data for any risk factor except pregnancy (Appendix …