PROJECT SUMMARY/ABSTRACT
More than 34 million people experience food insecurity in the US, and 1 in 3 households with low incomes are
food insecure. A growing body of evidence suggests that food insecurity is associated with higher rates of
cardiovascular disease and mortality. Therefore, efforts to improve food insecurity may be critical to improving
cardiovascular health in low-income adults. During the first months of the COVID-19 pandemic, food insecurity
increased dramatically among low-income adults. In response, the federal government took unprecedented
steps to expand benefits through the Supplemental Nutrition Assistance Program (SNAP). These policy actions
provided emergency allotments that collectively doubled the average SNAP benefit – the largest-ever increase.
However, SNAP emergency allotments were recently de-implemented across 32 US states on March 2023,
with some states electing to do so much earlier (2021), resulting in a significant increase in food insecurity.
Many policy experts believe that this reduced investment in SNAP benefits could not only impede low-income
families’ ability to purchase healthy foods, but may also create competing financial demands that have adverse
spillover effects. For example, low-income families may be forced to choose between spending limited financial
resources on food instead of important health care services and may also find it more challenging to afford
(and adhere to) important medications, which could collectively worsen cardiovascular health. However, these
hypotheses have not been rigorously tested to date. The time-staggered way in which SNAP emergency
allotments were de-implemented across US states provides a rare and unique opportunity to estimate the
causal effects of changes in SNAP benefits, and to elucidate the pathways by which food insecurity impacts
cardiometabolic health. In this proposal, will use a unique combination of national datasets, including survey
data from NHIS, biometric & laboratory data from NHANES, and administrative claims data from Medicaid and
Medicare to accomplish three aims. In Aim 1 we will determine changes in food insecurity among low-income
adults, including those with diet-sensitive cardiometabolic risk factors, during and following the pandemic. In
Aim 2, we will leverage the natural experiment created by some US states ending SNAP emergency allotment
policies much earlier than others to evaluate their impact on health care access and affordability, the
prevalence, treatment, and control of cardiometabolic risk factors, and self-reported health. In Aim 3, we will
determine whether the de-implementation of SNAP emergency allotment policies led to changes in the
incidence of acute cardiovascular events (myocardial infarction, heart failure, stroke), as well as associated
outcomes. This research will advance our understanding of changes in food insecurity among millions of low-
income adults, elucidate pathways by which food insecurity impacts cardiovascular health, and provide critical
evidence on the spillover and health effects of SNAP benefits. Our work could have major public health
implications, and inform policy strategies to improve food security, cardiovascular health, & equity nationwide.