Incidence of Axillary Adenopathy in Breast Imaging After COVID-19 Vaccination

Abstract

pansion states. These findings are consistent with age-adjusted state cancer mortality data reported by the US Centers for Disease Control and Prevention, which do not clearly demonstrate a difference that favors either expansion or nonexpansion states (Figure Clinically meaningful baseline differences in cancer survival between expansion and nonexpansion states before the US Affordable Care Act, combined with unmeasured social, community-level, and state Medicaid program differences, could obscure any association of Medicaid expansion with cancer survival (unpublished data; Ermer 2021). Moreover, similar baseline trends are a key assumption of difference-in-difference analysis, which is one of the most common statistical approaches currently used to study expansion.